KR101074740B1 - Method, system and computer-readable recording medium for providing contextual advertisement using set of associated keywords - Google Patents

Abstract

The present invention relates to a method, a system and a computer readable recording medium for providing a contextual advertisement using a set of related keywords. According to an aspect of the present invention, there is provided a method for providing a contextual advertisement, the method comprising: extracting a predetermined set of related keywords including keywords in common with predetermined content, the set of related keywords comprising a plurality of related keywords; And extracting a contextual advertisement based on at least one keyword included in the extracted related keyword set, wherein the contextual advertisement is provided to a user terminal device.

Contextual advertising, set of related keywords

Description

FIELD OF THE INVENTION, SYSTEM AND COMPUTER-READABLE RECORDING MEDIUM FOR PROVIDING CONTEXTUAL ADVERTISEMENT USING SET OF ASSOCIATED KEYWORDS}

The present invention relates to a method, a system and a computer readable recording medium for providing a contextual advertisement using a set of related keywords. More specifically, the present invention generates a plurality of related keyword sets including a plurality of related keywords, and if the predetermined content includes a keyword common to a given set of related keywords, the keyword included in the related set of keywords A method, system and computer readable recording medium for providing contextual advertising relating to the content in association with the present invention.

Recently, due to the expansion of the use of various cyber spaces (e.g., web pages, blogs, cafes, Internet communities, etc.) that support the spread of Internet use and search functions, various Internet contents are generated by individual users and businesses. It is common to distribute it. In such a cyber space, it is also possible to provide advertisements (ie, advertisement contents) together with various contents.

In this regard, attention can be paid to the so-called Contextual Advertisement that selects and provides advertisements associated with contents provided in cyberspace. Contextual advertisements are also interested in advertisements provided by users who are interested in the contents by grasping the contents of the contents in cyberspace in various ways and selecting and providing advertisements in which the contents and the subjects match or are related. As a general term for an advertising method or an advertising content according to such a method, the text-based content is analyzed to grasp a corresponding topic, and then generally implemented by selecting and providing an advertisement corresponding to the theme. Such a contextual advertisement can serve as a targeting advertisement in that the content that the user views is likely to be related to the user's interests.

In the conventional contextual advertisement, the subject grasp of the content has been mainly performed by analyzing information such as the number of times the keyword appears in the content (the entire content), the region in which the keyword appears, and extracting the main keyword. For example, in the conventional contextual advertising, keywords that are frequently used for content are considered to be more important than keywords that are less used, and keywords included in the title or tag of the content are more important than keywords in the body of the content. Has been judged to be higher.

However, according to such a conventional method, a case in which the main keyword of the content is incorrectly determined may occur. For example, assuming that a certain content includes a large number of keywords "Nike", it is common in a conventional context advertising system that an advertisement associated with a famous sports goods brand called "Nike" is selected and displayed as a contextual advertisement. to be. However, "Nike" is not only a famous sporting goods brand, but also refers to an operation of break dancing, and thus, as in a conventional contextual advertising system, "Nike" is a key keyword in consideration of the number of occurrences of the keyword in the content. If it is selected as, there is a problem that even if the keyword "nike" is used a lot in the content associated with the break dance sporting goods advertisement can be selected as the advertisement associated with the content.

It is an object of the present invention to solve all the problems described above.

In addition, another object of the present invention is to determine the context corresponding to the content by using the text data of the content.

It is another object of the present invention to provide a more effective contextual advertisement in accordance with a more carefully determined context.

Representative configuration of the present invention for achieving the above object is as follows.

According to an aspect of the present invention, there is provided a method for providing a contextual advertisement, the method comprising: extracting a predetermined set of related keywords including keywords in common with predetermined content, the set of related keywords comprising a plurality of related keywords; And extracting a contextual advertisement based on at least one keyword included in the extracted related keyword set, wherein the contextual advertisement is provided to a user terminal device.

According to another aspect of the present invention, there is provided a method for providing a contextual advertisement, the method comprising: generating a plurality of related keyword sets including a plurality of related keywords, including a keyword common to predetermined content among the plurality of related keyword sets; Extracting a predetermined set of related keywords, extracting a contextual advertisement based on at least one keyword included in the extracted set of related keywords, and providing the extracted contextual advertisement to a user terminal device. Provided are methods for inclusion.

According to another aspect of the present invention, there is provided a system for providing contextual advertising, comprising: an associated keyword set database, an advertisement database, and a predetermined associated keyword set including keywords in common with predetermined content from the associated keyword set database. The associated keyword set includes a plurality of related keywords, and includes an advertisement providing unit for extracting a contextual advertisement from the advertisement database based on at least one keyword included in the extracted associated keyword set, wherein the context The advertisement is provided with a system provided to the user terminal device.

According to still another aspect of the present invention, there is provided a system for providing contextual advertisements, comprising: an associated keyword set generation unit for generating a plurality of related keyword sets including a plurality of related keywords, and predetermined content among the plurality of related keyword sets. Extracting a predetermined set of related keywords including keywords in common with and extracting a contextual advertisement based on at least one keyword included in the extracted set of related keywords, and providing the extracted contextual advertisement to a user terminal device. Provided is a system that includes an advertisement provider for.

In addition, there is provided another method, system, and computer readable recording medium for recording a computer program for carrying out the method for implementing the present invention.

According to the present invention, the context corresponding to the content is determined by using the text data of the content.

According to the present invention, a more effective contextual advertisement is provided according to a more carefully determined context.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

DETAILED DESCRIPTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention.

[Preferred Embodiments of the Invention]

In the present specification, when the user views the digital content, the contextual advertisement may include an advertisement technique that allows advertisement information such as an advertiser's web page address, a single line advertisement message, and an image advertisement to be displayed. As a result of this generic term, in particular, the contextual advertisement referred to herein is performed by analyzing text data of the content that the user views. Here, the text data does not necessarily refer to text data included in the content itself, but is understood in the broadest sense to encompass text data obtained by using at least some of text data, image data, and audio data included in the content. Should be.

Configuration of the entire system

1 is a diagram schematically showing the configuration of an entire system for providing a contextual advertisement according to an embodiment of the present invention.

As shown in FIG. 1, the entire system according to an embodiment of the present invention includes a communication network 100, a contextual advertisement system 200 for providing contextual advertisement using a set of related keywords, an advertiser server (or an advertiser). Terminal device) 300, the user terminal device 400, and a request for content from the user terminal device 400, and combines the content requested by the user with the contextual advertisement provided by the contextual advertising system 200. It can be configured as a content server 500 provided to the user terminal device 400.

First, the communication network 100 may be configured regardless of communication modes such as wired and wireless, and may include a local area network (LAN), a metropolitan area network (MAN), and a wide area network (WAN). It can be composed of various communication networks. Preferably, the communication network 100 according to the present invention may be a known World Wide Web (WWW).

According to an embodiment of the present invention, the contextual advertising system 200 generates a plurality of related keyword sets including a plurality of related keywords, and performs the function of setting a weight of each keyword in each related keyword set. can do.

In addition, according to an embodiment of the present invention, if the predetermined content includes a keyword that is common to a predetermined set of related keywords, the contextual advertising system 200 includes keywords (preferably, several keywords) included in the set of related keywords. In relation to a keyword having a high weight).

In addition, according to an embodiment of the present invention, the contextual advertising system 200 has a function of selling the contextual advertising products displayed to the user corresponding to the keywords included in the associated keyword set to the advertiser through a bidding, auctioning, etc. method. Can be done.

According to an embodiment of the present invention, the advertiser server 300 may be a server including a function for allowing an advertiser to communicate after accessing the contextual advertising system 200. However, the present invention may be any digital device having a computing capability by mounting a microprocessor such as a personal computer (for example, a desktop computer, a notebook computer, etc.), a workstation, a PDA, a web pad, a mobile phone, and the like. Adopt one device of the advertiser server 300 or the advertiser terminal 300 according to the.

In detail, the advertiser may access the contextual advertisement system 200 through the advertiser server 300 and purchase a keyword for displaying his / her advertisement. The advertiser server 300 may be a homepage operation server operated by an advertiser to provide a product or a service.

On the other hand, the user terminal device 400 according to an embodiment of the present invention is a digital device that includes a function that allows the user to communicate after connecting to the content server 500, a personal computer (for example, a desktop computer) , A laptop computer or the like), a workstation, a PDA, a web pad, a mobile phone, etc., any memory device having a memory means and equipped with a microprocessor can be adopted as the user terminal device 400 according to the present invention. Can be.

According to an embodiment of the present invention, the content server 500 communicates with the contextual advertisement system 200 and / or the user terminal device 400. For example, the content server 500 may be an operation server of an Internet portal site. In this case, the content server 500 may include a web content search engine (not shown), and the content server from the user terminal device 400. The user may receive a search condition for the content stored in the 500, search for content that meets the received search condition, and provide the search result to the user terminal device 400 for the user to browse. The content provided as a search result may be various information about news, knowledge, games, communities, and the like. Of course, if necessary, the web content search engine may be included in a computing device or a recording medium other than the content server 500. In addition, the content server 500 may include a content database (not shown) for storing content collected by a search engine, and a query log database (not shown) for storing historical information about a search query input by a user into the search engine. May be included). In addition, although the contextual advertisement system 200 and the content server 500 are illustrated separately in FIG. 1, the contextual advertisement service 200 and the contextual advertisement service are provided together according to the needs of those skilled in the art. In this case, the content server 500 may include a contextual advertising system 200.

Contextual advertising system

Hereinafter, the internal structure of the contextual advertisement system 200 performing important functions for the implementation of the present invention and the function of each component will be described.

2 is a diagram illustrating in detail the internal configuration of the contextual advertising system 200 according to an embodiment of the present invention.

2, the contextual advertising system 200 according to an embodiment of the present invention includes an advertiser interface unit 210, an associated keyword set generation unit 220, an advertisement providing unit 230, and a database manager 240. , The communication unit 250 and the control unit 260 may be included, and the related keyword set generation unit 220 may be a content analyzer 222, a query analyzer 224, and a purchase history analyzer 226. It can be seen that the weight setting unit 228 may be configured. According to the exemplary embodiment of the present invention, the advertiser interface 210, the related keyword set generation unit 220, the advertisement providing unit 230, the database manager 240, the communication unit 250, and the controller 260 are among them. At least some may be program modules communicating with the advertiser server 300, the user terminal device 400, and / or the content server 500. Such program modules may be included in the contextual advertising system 200 in the form of operating systems, application modules, and other program modules, and may be physically stored on a variety of known storage devices. In addition, these program modules may be stored in a remote storage device that can communicate with the contextual advertising system 200. On the other hand, such program modules include, but are not limited to, routines, subroutines, programs, objects, components, data structures, etc. that perform particular tasks or execute particular abstract data types, described below, in accordance with the present invention.

First, the advertiser interface 210 according to an embodiment of the present invention may perform a function of providing an advertiser interface 300 to an advertiser server 300 that allows an advertiser to search and purchase a contextual advertisement product. More specifically, the advertiser interface 210 provides a keyword lookup function, a contextual advertisement product purchase and payment function, an advertiser account management function, etc. in order to enable an advertiser to purchase a contextual advertisement product for a specific keyword. May be provided to the advertiser server 300. Such an advertiser interface may be activated by a predetermined program module or application program and activated in the advertiser server 300. In addition, the advertiser may select or specify a keyword that the user wants to display the contextual advertisement with, but it is not necessary to input the advertisement contents through the advertiser interface to replace or select the keyword. In this case, the advertiser may further input information about the corresponding advertisement content (for example, URL of the advertiser server 300, tag information about the advertisement content, and the like). Information about the advertisement content of the advertiser who purchased the contextual advertisement product may be stored in the advertisement database 240b to be described later.

Next, according to an embodiment of the present invention, the related keyword set generation unit 220 may generate a related keyword set by grouping several keywords having relevance to each other.

More specifically, according to an embodiment of the present invention, the content analyzer 222 may perform a function of generating a related keyword set by analyzing a plurality of contents stored in a content database of the content server 500.

In addition, according to an embodiment of the present invention, the query analysis unit 224 performs a function of generating a set of related keywords by analyzing various search queries input from the plurality of user terminal devices 400 to the content server 500. can do.

Meanwhile, according to an embodiment of the present invention, the purchase history analyzer 226 may perform a function of analyzing a keyword purchase history of a plurality of advertisers and generating a related keyword set.

In addition, according to an embodiment of the present invention, the weight setting unit 228 may perform a function of setting a weight in the related keyword set for each of the plurality of keywords included in each related keyword set.

According to an embodiment of the present invention, the advertisement providing unit 230 extracts the contextual advertisement of the advertiser associated with the content provided to the user terminal device 400, and provides the extracted contextual advertisement to the content server 500. Can be performed. That is, when the content requested by the user is provided to the user terminal device 400, the advertisement providing unit 230 may support the content server 500 to provide the contextual advertisement associated with the content.

The database manager 240 according to an exemplary embodiment of the present invention includes an associated keyword set database 240a in which a plurality of keywords related to each other are grouped and stored, and an advertisement in which information about an advertisement content of an advertiser who purchases a contextual advertisement is stored. The database 240b may include a history database 240c in which a history of purchasing an advertisement product by the advertiser is stored.

The communication unit 250 according to an embodiment of the present invention has a function of allowing the contextual advertising system 200 to communicate with an external device such as the advertiser server 300, the user terminal device 400, the content server 500, or the like. To perform.

The control unit 260 according to an embodiment of the present invention is a flow of data between the advertiser interface unit 210, the associated keyword set generation unit 220, the advertisement providing unit 230, the database manager 240, and the communication unit 250. It performs the function of controlling. That is, the controller 260 controls the flow of data from the outside or between each component of the contextual advertising system 200, thereby providing the advertiser interface 210, the associated keyword set generation unit 220, and the advertisement providing unit 230. ), The database manager 240 and the communication unit 250 controls to perform a unique function.

In the above description, the database storing information for implementing the present invention is classified into three databases, namely, the associated keyword set database 240a, the advertisement database 240b, and the history database 240c. Can be changed as needed by those skilled in the art.

Finally, in the present specification, a database is a concept that includes not only a negotiated database but also a broad database including a data file based on a computer file system, and the like. It should be understood that if data can be extracted, it can be included in the database referred to in the present invention.

Generating a set of related keywords

According to an embodiment of the present invention, the related keyword set generation unit 220 may generate a related keyword set by grouping a plurality of keywords having relevance to each other. A detailed process of generating a set of related keywords may be performed in various ways as follows.

1. Content Analysis

According to an embodiment of the present invention, the generation of a related keyword set may be performed by analyzing a plurality of keywords included in a plurality of contents stored in a content database of the content server 500.

Specifically, first, the content analyzer 222 extracts two or more keywords for each content stored in the content database of the content server 500 to generate a keyword set. In this case, generating the above keyword set for all of the vast amount of content stored in the content database may put a considerable computational burden on the contextual advertising system 200, and thus the range of the content to be analyzed may be appropriately limited. have.

The content analyzer 222 may store the keyword sets generated as described above and calculate the number of times each keyword set appears in the content. For example, with respect to a keyword set such as <Nike, Golf, Tiger Woods>, the number of contents including all three keywords may be calculated. In this case, if the number of the above content is more than a predetermined threshold value, the keyword set may be recognized as an associated keyword set.

2. Query Analysis

According to an embodiment of the present invention, the generation of a related keyword set may be performed by analyzing a plurality of search queries transmitted from the user terminal device 400 to the content server 500.

In detail, the query analyzing unit 224 according to an embodiment of the present invention may generate a related keyword set by analyzing a log of a search query stored in a query log database of the content server 500. For example, the query analyzing unit 224 extracts several keywords commonly included in one search query together, or extracts several keywords included in two or more search queries consecutively input by the same user, and extracts the extracted keywords. If the set of s indicates a frequency above a threshold, an associated keyword set including the same may be generated.

3. Purchase History Analysis

According to an embodiment of the present invention, the generation of a related keyword set may be performed by analyzing a history of keywords in which an advertiser purchases a search advertisement product or a contextual advertisement product.

Specifically, according to an embodiment of the present invention, when an advertiser bids on an advertisement product, the advertiser specifies or selects a keyword associated with the advertisement. When a purchase is made according to the auction, the corresponding history is stored in a history database ( 240c) or the like. Accordingly, the purchase history analyzer 226 may generate a plurality of keyword sets including two or more keywords associated with the purchase of the advertisement product of the advertiser with reference to the purchase history stored in the history database 240c.

A plurality of keyword sets generated as described above may be recognized as a related keyword set depending on the frequency in which they are included in the history database 240c or the like. As such, when recognizing a keyword set included in a purchase history as a related keyword set, a keyword set determined based on a purchase history by the same advertiser or a purchase history for the same advertisement category may be recognized as a related keyword set with a higher probability. have.

A plurality of related keyword sets generated using the above three methods or other known methods are stored in the related keyword set database 240a.

Meanwhile, the weight setting unit 228 according to an embodiment of the present invention may set weights in the related keyword set for each keyword included in each related keyword set. According to an embodiment of the present invention, a weight set for each keyword may be directly determined by an administrator of the contextual advertising system 200. According to another embodiment of the present invention, the weight set for each keyword is the number of times each keyword appears in the content, the number of times a search query including each keyword is queried, and / or the number of times an advertisement product associated with each keyword is sold. It may be determined in consideration of the price or price.

3 is a diagram exemplarily illustrating a set of related keywords generated according to an embodiment of the present invention.

Referring to FIG. 3, it can be seen that a related keyword set related to "sporting goods" and "dance" is exemplarily illustrated, and the keyword "nike" is commonly included in both sets. In addition, it can be seen that each keyword included in the related keyword set is assigned a weight in each related keyword set. In particular, in the case of the keyword "Nike", the keyword set related to "sporting goods" Although it is set to have a weight, it turns out that it is set to have a weight of 2 in the association keyword set regarding "dance". Even in the same keyword, different weights may be set according to which related keyword set the keyword belongs to, which may be used to provide a more suitable contextual advertisement with respect to specific content as described below.

Providing contextual advertising using a set of related keywords

Hereinafter, a method of providing a contextual advertisement using a set of related keywords generated according to the above method will be described in detail.

According to an embodiment of the present invention, the advertisement providing unit 230 performs a function of extracting the contextual advertisement associated with the content provided to the user terminal device 400 and providing the extracted contextual advertisement to the content server 500. Can be.

Specifically, the advertisement providing unit 230 obtains a plurality of keywords included in the content provided to the user terminal device 400, and stores them in the associated keyword set database 240a. In comparison with the plurality of related keywords, at least one set of related keywords representing the best matching may be selected (for example, the advertisement providing unit 230 may select at least some of the plurality of keywords included in the content for each related keyword). You can choose the set of related keywords with the most overlapping keywords, compared to the multiple keywords in the set).

4 is a diagram illustrating content displayed on the user terminal device 400 according to an embodiment of the present invention.

Referring to FIG. 4, the content displayed on the user terminal device 400 includes keywords such as "Nike", "B-boy", and "water tree", which are among the related keyword sets illustrated in FIG. It can be seen that more keywords overlap with the related keyword set for "dance" than the related keyword set for "sports goods". Accordingly, the advertisement providing unit 230 determines that the content provided to the user terminal device 400 is associated with "dance", and uses the keyword included in the related keyword set related to "dance" to the user terminal device 400. Can determine the contextual advertisement to be provided to the.

According to an embodiment of the present invention, an advertiser may purchase a right to display a contextual advertisement with respect to a specific keyword, and the advertisement providing unit 230 may relate to one keyword included in a related keyword set to which the keyword belongs. The above contextual advertisement may be extracted and provided. For example, in FIGS. 3 and 4, the advertisement providing unit 230 may include a context related to a keyword such as "dance" or "break dance", which are keywords included in a set of related keywords including a specific keyword "dance". Advertisement may be provided.

In addition, according to an embodiment of the present invention, the advertisement providing unit 230 may provide the contextual advertisement in consideration of the weight of the keyword included in the related keyword set in providing the above advertisement. For example, the advertisement providing unit 230 may provide a contextual advertisement for a keyword such as "dance" or "break dance" having a high weight among several keywords included in the related keyword set related to "dance" in FIG. 3. It may be noted that the two keywords are not included in the content targeted for the contextual advertisement. Of course, contextual advertising may also be provided for keywords such as "Nike", "B-boy", "Tiny".

FIG. 5 is a diagram exemplarily illustrating how a context advertisement corresponding to the content shown in FIG. 4 is displayed on the user terminal device 400.

Referring to FIG. 5, according to the related art, in a situation in which a keyword of "Nike" in content is highly emphasized and a contextual advertisement about sports goods is highly likely to be provided, a contextual advertisement regarding a keyword such as "B-boy" is provided. can see.

Embodiments according to the present invention described above may be implemented in the form of program instructions that may be executed by various computer components, and may be recorded in a computer-readable recording medium. The computer-readable recording medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the computer-readable recording medium may be those specially designed and configured for the present invention, or may be known and available to those skilled in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs, DVDs, and magneto-optical media such as floptical disks. media), and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules to perform the process according to the invention, and vice versa.

Although the present invention has been described by specific embodiments such as specific components and the like, but the embodiments and the drawings are provided to assist in a more general understanding of the present invention, the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations can be made from these descriptions.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

1 is a diagram schematically showing the configuration of an entire system for providing a contextual advertisement according to an embodiment of the present invention.

2 is a diagram illustrating in detail the internal configuration of the contextual advertising system 200 according to an embodiment of the present invention.

3 is a diagram exemplarily illustrating a set of related keywords generated according to an embodiment of the present invention.

4 is a diagram illustrating content displayed on the user terminal device 400 according to an embodiment of the present invention.

FIG. 5 is a diagram exemplarily illustrating how a context advertisement corresponding to the content shown in FIG. 4 is displayed on the user terminal device 400.

<Brief description of the major reference numerals>

100: network

200: contextual advertising system

210: advertiser interface

220: association keyword set generation unit

222: content analysis unit

224: query analysis unit

226: purchase history analysis unit

228: weight setting unit

230: advertising provider

240: database management unit

240a: Association keyword set database

240b: advertising database

240c: history database

250: communication unit

260: control unit

300: advertiser server

400: user terminal device

500: content server

Claims (23)

As a method for providing contextual advertising, A system that provides contextual advertising, Extracting a predetermined set of related keywords including the same common keywords as at least some of the keywords included in the predetermined content, wherein the set of related keywords includes a plurality of related keywords and is generated by statistical analysis; and Extracting a contextual advertisement based on at least one keyword included in the extracted associated keyword set, The extracting of the predetermined related keyword set may include selecting an associated keyword set having the most keywords that overlap with keywords included in the predetermined content. The contextual advertisement is provided to a user terminal device. The method of claim 1, The content is retrieved by a request from the user terminal device. The method of claim 1, Wherein said common keyword is at least two. The method of claim 1, Wherein the set of related keywords comprises a plurality of keywords commonly found in a plurality of content. The method of claim 1, The associated keyword set includes a plurality of keywords commonly found in a query entered by a plurality of users. The method of claim 1, Wherein the set of related keywords comprises a plurality of keywords commonly found in a set of query terms consecutively input by a plurality of users. The method of claim 1, The associated keyword set is generated based on a keyword purchase history by an advertiser. The method of claim 1, Wherein the set of related keywords further comprises weights for each of the plurality of related keywords. The method of claim 8, The at least one keyword included in the extracted associated keyword set has a relatively higher weight than other keywords included in the extracted associated keyword set. As a method for providing contextual advertising, A system that provides contextual advertising, Generating a plurality of sets of related keywords comprising a plurality of related keywords based on the statistical analysis, Extracting, from the plurality of related keyword sets, a predetermined set of related keywords including the same common keywords as at least some of the keywords included in the predetermined content; Extracting a contextual advertisement based on at least one keyword included in the extracted associated keyword set, and Providing the extracted contextual advertisement to a user terminal device; The extracting of the predetermined set of related keywords includes selecting a set of related keywords with the most keywords that overlap with keywords included in the predetermined content. A system for providing contextual advertising, Associated keyword set database, Advertising database, and A predetermined set of related keywords including the same common keywords as at least some of the keywords included in the predetermined content, wherein the set of related keywords includes a plurality of related keywords and is generated by statistical analysis; And an advertisement providing unit for extracting a contextual advertisement from the advertisement database based on at least one keyword included in the extracted related keyword set. The advertisement providing unit extracts, from the plurality of related keyword sets, a related keyword set with the most keywords that overlap with keywords included in the predetermined content. The contextual advertisement is provided to a user terminal device. The method of claim 11, The content is retrieved by a request from the user terminal device. The method of claim 11, The common keyword is at least two. The method of claim 11, Wherein the set of related keywords comprises a plurality of keywords commonly found in a plurality of content. The method of claim 11, The associated keyword set includes a plurality of keywords commonly found in a query entered by a plurality of users. The method of claim 11, Wherein the set of related keywords comprises a plurality of keywords commonly found in a set of queries that are continuously input by a plurality of users. The method of claim 11, The associated keyword set is generated based on a keyword purchase history by an advertiser. The method of claim 11, And in said associative keyword set database, said associative keyword set further comprising weights for each of said plurality of associative keywords. The method of claim 18, And the at least one keyword included in the extracted associated keyword set has a relatively higher weight than other keywords included in the extracted associated keyword set. A system for providing contextual advertising, An association keyword set generation unit for generating a plurality of association keyword sets including a plurality of association keywords based on statistical analysis, Extracting, from the plurality of related keyword sets, a predetermined set of related keywords including the same common keywords as at least some of the keywords included in predetermined content, based on at least one keyword included in the extracted set of related keywords; Extracts a contextual advertisement, and includes an advertisement providing unit for providing the extracted contextual advertisement to a user terminal device; And the advertisement providing unit extracts a related keyword set having the most keywords overlapping with a keyword included in the predetermined content from the plurality of related keyword sets. A computer-readable recording medium for recording a computer program for executing the method according to any one of claims 1 to 10. delete delete

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