JP2007286833A - Advertisement distribution system and advertisement distribution program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an advertisement distribution system and an advertisement distribution program capable of providing advertisements associated with web content included in a website browsed. <P>SOLUTION: Keywords and/or topics are extracted from the content of an advertisement insertion website for which advertisements are inserted, and are stored in advance in association with the address information of the content. When a reader requests access to the content, a search for advertisements is made based on the keywords and/or topics corresponding to the address information of the content accessed, and the content with the advertisements is provided to the reader. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an advertisement distribution system and an advertisement distribution program that improve an advertising effect by adapting an advertisement to be posted on a Web content browsed by a viewer to the content of the Web content.

  As a method for providing advertisements via the Internet, advertisements are placed on Web contents browsed by the viewer, and when the viewer clicks on the advertisement, it is connected to the advertiser's website so that detailed information on the advertisement can be referred to.

As a method for placing advertisements on Web contents, the same advertisements such as banner advertisements are used for a certain period of time as seen on some specific search engines and information provider websites (for example, websites that sell online). There are some which publish or publish an advertisement linked to a search keyword input by a viewer (see Non-Patent Document 1).
http://www.jpo.go.jp/shiryou/s_sonota/hyoujun_gijutsu/net_koukoku/080.html

  Of the above-described advertisement placement methods, the banner advertisement method publishes the same advertisement for a certain period of time, so it does not necessarily match the content of the web content being browsed by the viewer. It does n’t reflect the click-through rate, and it ca n’t improve the clickthrough rate.

  On the other hand, the method of posting an advertisement linked to a search keyword can reflect the interest of the viewer on a search engine website or an information provider website having a search function. However, there is a problem that it cannot be applied to a website that does not have a search function, for example, a personal website represented by a blog.

  An object of the present invention is to provide an advertisement distribution system and an advertisement distribution program capable of providing an advertisement linked to the contents of Web content included in a browsed Web site.

  In order to achieve the above object, an advertisement comprising an advertisement posting website for posting a distributed advertisement, an advertisement database for storing the advertisement, and an advertisement distribution server for selecting and managing the advertisement In the distribution system, the advertisement distribution server includes an advertisement insertion target website registration means for registering address information of the advertisement posting website, and content to be posted by the advertisement from the advertisement posting website according to the address information. Content collection means for extracting and collecting text, text information extraction means for extracting text information from the content, and keywords / topics for targeting the content from the text information Keyword / topic extraction means for extracting the keyword and the keyword / Keyword / topic management means for storing and managing a topic in association with the address information, and when an advertisement distribution request is issued from the advertisement posting website, based on the address information of the advertisement posting website The keyword / topic search means for searching for the corresponding keyword / topic from the keyword / topic management means, and the corresponding advertisement from the advertisement database based on the keyword / topic searched and extracted by the keyword / topic search means And an advertisement distribution means for distributing the advertisement extracted by the advertisement search means to the advertisement posting website.

  In addition, the present invention described in claim 2 is the method according to claim 1, wherein the content of the advertisement posting website is periodically monitored for the presence or absence of the content update. When the notification is received from the advertisement posting website updated, the text information extraction means extracts the text information from the updated contents, and the keyword / topic extraction means The keyword / topic is extracted from the extracted text information, and is associated with the address information of the updated advertising website based on the extracted keyword / topic by the keyword / topic management means. Keyword / topic for updating the keyword / topic And gist in that it comprises updating means.

  Further, in the present invention described in claim 3, in the first or second aspect, the advertisement posting target content collection unit is configured such that when a lower website is linked to the advertisement posting website of the content, The gist is to collect all the linked websites.

  According to a fourth aspect of the present invention, the weighted keyword / topic is extracted from any one of the first to third aspects, and the keyword / topic based on the weighting is extracted from the keyword / topic. The keyword / topic management means stores and manages the selected keyword / topic in association with the address information of the advertising website. And

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the text information extracting means can convert at least the HTML format and the XML format into the content collected by the advertising target content collecting means. In the case of a language using a tag including, when deleting the tag from the content and extracting the text information, a priority is given to the text portion surrounded by the tag according to the type of the tag. The selected text portion is extracted from the extracted text portions based on the priority order, and the keyword / topic extraction means is extracted by the keyword / topic extraction means for the text portion. The extracted keyword / topic is the address of the advertising website. And gist to manage accumulated in association with the distribution.

  According to a sixth aspect of the present invention, in any one of the first to third aspects of the present invention, the text information extracting unit can convert at least the HTML format and the XML format into the content collected by the advertisement insertion target content collecting unit. In the case of a language using a tag including, when deleting the tag from the content and extracting the text information, a priority is given to the text portion surrounded by the tag according to the type of the tag. And a keyword / topic selecting means for extracting the text portion to which the priority is given, wherein the keyword / topic extracting means is for each of the extracted text portions of the priority or the same Extract keywords / topics weighted to the set of text parts of priority The keyword / topic selection means selects the keyword / topic based on the priority order of the text part and the weight of the extracted keyword / topic, and the keyword / topic management means selects the keyword / topic selection The gist is to store and manage the keyword / topic selected by the means in association with the address information of the advertisement posting website.

  The present invention according to claim 7 is an advertisement posting website for posting a distributed advertisement, an advertisement database for storing the advertisement, an advertisement distribution server for selecting and managing the advertisement, , An advertisement distribution program readable by a computer constituting an advertisement distribution system comprising: a step of registering address information of the advertisement insertion website in an advertisement insertion target website registration means; and an advertisement insertion target content collection Means for extracting and collecting the content to be posted on the advertisement from the advertisement posting website based on the address information; extracting text information from the content in the text information extracting means; and keyword / topic In the extracting means, the text information is used to extract the code. A step of extracting a keyword / topic for advertising content, a step of storing and managing the keyword / topic in association with the address information in a keyword / topic management means, and a keyword / topic search Means for retrieving a corresponding keyword / topic from the keyword / topic management means based on address information of the advertisement posting website when an advertisement distribution request is issued from the advertisement posting website; Means for retrieving and extracting a corresponding advertisement from the advertisement database based on the keyword / topic retrieved by the keyword / topic retrieval means and extracted in the advertisement distribution means by the advertisement retrieval means Said wide And a step to be distributed to the advertising Web site, and the spirit that causes the computer to function with.

  ADVANTAGE OF THE INVENTION According to this invention, the advertisement delivery system and advertisement delivery program which can provide the advertisement linked | linked with the content of the web content contained in the browsed website can be provided.

  A system configuration diagram of the present embodiment is shown in FIG. 1, and an operation sequence of the present embodiment is shown in FIG.

  In FIG. 1, 100 is a browser terminal 1 to n that browses Web content provided by an information provider, and 200 is an advertisement posting Web site 1 to 200 that is an information provider's Web site that has approved posting of an advertisement on the Web content. m and 300 are advertisement distribution servers that select advertisements to be posted on the web content of the advertisement posting website 200 and provide them to the advertisement posting website 200. The browser terminal 100, the advertisement posting website 200, and the advertisement distribution server 300 are connected via the Internet.

  In the following description, the web content for which the advertisement placement on the advertisement placement website 200 is approved is referred to as an advertisement placement target content.

  The advertisement distribution server 300 advertises advertisements from the advertisement publication target website registration unit 301 for registering the address information of the advertisement insertion websites 1 to m and each advertisement publication target website registered by the advertisement publication target website registration unit 301. An advertisement placement target content collection unit 302 that collects target content, a text information extraction unit 303 that extracts text information from the contents of the advertisement placement target content collected by the advertisement placement target content collection unit 302, and a text information extraction unit 303 A keyword / topic extraction unit 304 that extracts keywords / topics from the extracted text information, and a keyword that selects a keyword / topic to be used for an advertisement search from the keywords / topics extracted by the keyword / topic extraction unit 304 A topic selection unit 305, a keyword / topic management unit 306 for registering and managing keywords / topics used for searching for advertisements in association with address information of advertisement insertion target content, and a browser from the browser terminal 100 for an advertisement posting Web A keyword / topic search unit 307 for searching for a keyword / topic from the keyword / topic management unit 306 based on address information of advertisement insertion target content that has accessed the site, an advertisement database 308 that is a database for storing advertiser advertisements, and a keyword / Advertisement search means 309 for searching for advertisements from the advertisement database 308 based on the keywords / topics searched by the topic search means 307, and a wide distribution for distributing the advertisements searched for by the advertisement search means 309 to the advertisement posting website 200 A distribution unit 310, and a keyword / topic update unit 311 for updating the association between the keyword / topic of the keyword / topic management unit 306 and the address information of the advertisement insertion content when the advertisement insertion target content is updated; Consists of.

  The advertisement posting target website registration unit 301 of the advertisement distribution server 300 registers the address information of the advertisement posting website that has approved the posting of the advertisement on the Web content. As the address information, the URL of an advertisement posting website, RSS feed, or the like is used.

  Approval for the advertisement placement on the Web content is made by a contract between the information provider who has established the advertisement insertion target website, the advertiser who provides the advertisement, and the administrator of the advertisement distribution server. In the contract, the amount of money paid from the advertiser to the information provider opening the advertisement insertion website or the administrator of the advertisement distribution server is determined according to the number of clicks on the advertisement of the viewer (see FIG. 2 S1).

  The advertisement placement target content collection unit 302 of the advertisement distribution server 300 collects the advertisement placement target content from each advertisement placement website 200 based on the address information of the advertisement placement website registered by the advertisement placement target website registration unit 301. . At that time, if the lower web page is linked to the web page of the advertisement posting target content of the advertisement posting website registered by the advertisement posting target website registration unit 301, all the lower web pages are collected. It may be. When the web page of the advertisement placement target content is the top page, all the web pages related to the advertisement placement target content can be collected (S2 in FIG. 2).

  The text information extraction unit 303 of the advertisement distribution server 300 extracts text information from the contents of each advertisement placement target content collected by the advertisement placement target content collection unit 302. Specifically, for example, when the advertisement insertion target content uses a tag as in a language such as HTML format or XML format, the tag information is deleted from the advertisement insertion target content and only the text portion is extracted. (S3 in FIG. 2).

  The keyword / topic extracting unit 304 of the advertisement distribution server 300 extracts the keyword / topic from the text information including the text portion of the advertisement insertion target content extracted by the text information extracting unit 303. As a keyword or topic extraction method, for example, the method described in Japanese Patent Application Laid-Open No. 2004-46621 “Text Multiple Topics Extraction Method and Device, Text Multiple Topics Extraction Program, and Recording Medium Registered with the Program” is used. be able to. By using the method described in Japanese Patent Application Laid-Open No. 2004-46621, it is possible to obtain a plurality of weighted keywords / topics for text information (S4 in FIG. 2).

  The keyword / topic selection means 305 of the advertisement distribution server 300 uses the obtained keyword / topic as it is for the advertisement search when all the keywords / topics extracted by the keyword / topic extraction means 304 are used for the advertisement search. / Select as a topic. If there are many extracted keywords / topics and it is necessary to narrow down the keywords / topics used for the advertisement search, the necessary keywords / topics are narrowed down from the keywords / topics extracted by the keyword / topic extraction means 304 to Select keywords / topics to use for searching. Specifically, when a plurality of weighted keywords / topics are obtained as the keywords / topics extracted by the keyword / topic extraction means 304 as in the method described in Japanese Patent Application Laid-Open No. 2004-46621. In accordance with the weighting, for example, only the most important weighting keyword / topic is selected as the keyword / topic, or some of the most important keywords / topics are selected as the keyword / topic (S5 in FIG. 2).

  The keyword / topic management unit 306 of the advertisement distribution server 300 stores the keyword / topic selected by the keyword / topic selection unit 305 in association with the address information of the advertisement posting website from which the keyword / topic is to be extracted (see FIG. 2 S6).

  A browser of web content obtains necessary information by accessing a web site that provides various types of information from the browser terminal 100. When a visitor accesses the advertisement posting website 200, the advertisement posting website 200 adds address information of the advertisement posting website to the advertisement distribution server 300 in order to acquire an advertisement to be posted on the accessed advertisement insertion content. The advertisement distribution request is made (S7 in FIG. 2).

  Upon receiving the advertisement distribution request from the advertisement posting website 200, the keyword / topic search unit 307 of the advertisement distribution server 300 responds from the keyword / topic management unit 306 based on the address information of the advertisement posting website included in the advertisement distribution request. One or a plurality of keywords / topics to be acquired are acquired (S8 in FIG. 2).

  The advertisement search unit 309 of the advertisement distribution server 300 searches for a corresponding advertisement from the advertisement database 308 based on one or more keywords / topics acquired by the keyword / topic search unit 307. When there are a plurality of keywords / topics, an advertisement for each keyword / topic is searched. In the advertisement database 308, advertisements acquired from advertisers are stored in advance in association with keywords / topics (S9 in FIG. 2).

  The advertisement distribution means 310 of the advertisement distribution server 300 distributes the advertisement searched by the advertisement search means 309 to the advertisement posting website 200 that has requested the advertisement distribution (S10 in FIG. 2).

  The advertisement posting website 200 to which the advertisement is distributed adds the advertisement to the advertisement insertion target content and distributes it to the viewer terminal 100 that has accessed the advertisement insertion target content (S11 in FIG. 2).

  The browser terminal 100 receives and browses the advertisement insertion target content to which the advertisement is added (S12 in FIG. 2).

  When the content of the advertisement insertion target content on the advertisement insertion target website is updated, the content is stored in the keyword / topic management unit 306 by the keyword / topic update unit 311 of the advertisement distribution server 300. The keyword / topic associated with the updated address information of the advertisement posting website is updated to a new keyword / topic extracted from the updated advertisement insertion target content.

  Specifically, the keyword / topic update unit 311 has been updated by periodically checking the notification of the update from the advertisement posting website 200 and the contents of the advertisement insertion target content of the advertisement insertion website 200. Detect that.

  The keyword / topic update unit 311 collects the advertisement insertion target content updated from the advertisement insertion website 200 by the advertisement insertion target content collection unit 302, and the text information extraction unit 303 extracts the text from the updated advertisement insertion target content. Extract information. The keyword / topic extracting unit 304 extracts keywords / topics from the extracted text information, the keyword / topic selecting unit 305 selects the extracted keywords / topics as necessary, and the obtained keywords / topics are used. The contents of the keyword / topic management means 306 are changed.

  As described above, in the advertisement distribution server, keywords / topics are extracted based on the contents of advertisement insertion target contents accessed by the viewer, advertisements are searched based on the extracted keywords / topics, and the searched advertisements are displayed on the advertisement posting Web. By distributing it to the site and providing it to the reader terminal after adding the advertisement to the content to be posted on the advertisement posting website, the viewer can obtain an advertisement related to the content of the accessed content, and thus is more interested. It is easy to obtain certain information, and for the advertiser and the administrator of the advertisement distribution server, it is possible to effectively provide a useful advertisement to the viewer.

  In addition, when extracting keywords / topics from the content to be advertised, multiple weighted keywords / topics are extracted, and advertisements are searched and provided based on them. It becomes effective for each of the manager, the advertiser, and the administrator of the advertisement distribution server.

  Furthermore, keywords / topics are extracted from the advertisement insertion content of the advertisement insertion website, stored in advance in association with the address information of the advertisement insertion content, and there is a request for access to the advertisement insertion content from the browser terminal. In this case, an advertisement is searched for based on the accumulated keyword / topic, so that the keyword / topic is extracted from the advertisement insertion content every time the advertisement insertion target content is accessed from the reader terminal. Compared to this, the advertisement search time can be shortened. The effect is obtained.

  Next, the operation when priority is set in the extraction of text information in the text information extraction means 303 will be described in detail with reference to FIG.

  In the above description, the text information extraction unit 303 of the advertisement distribution server 300 uses the tag information from the advertisement insertion target content when the advertisement insertion target content uses a tag like a language such as HTML format or XML format. Described above is a case where, when deleting and extracting a text part, each extracted text part is treated as the same level without giving priority.

  However, there are various types of tag information. Among them, those that indicate titles and headings indicate the content of the content to be advertised more accurately. By extracting, keywords / topics can be extracted more accurately.

  The text information extraction unit 303 of the advertisement distribution server 300 first assigns α as a priority order according to the type of tag information. For example, in the case of an HTML format language, for a tag indicating a title: <TITLE>, a tag indicating a headline: <H1>, <H2>, α1 is set as the highest priority, and another tag indicating a headline: <H3 >, <H4>, <H5>, <H6> can be given α2 as the next highest priority, and α3 can be given the lowest priority for the other tags. Here, α1> α2> α3> is set (S20 in FIG. 3).

  Next, tag information is extracted from the advertisement insertion target content collected by the advertisement insertion target content collection unit 302 (S21 in FIG. 3).

  The priority set in the tag information is assigned to the text portion surrounded by the extracted tag information (S22 in FIG. 3).

  In the subsequent operations, the operations differ depending on how the tag information priority is used.

  First, a case where only the priority order of tag information is used will be described. Next, a case where both the priority order of tag information and the keyword / topic weighting obtained by the keyword / topic extraction means 304 will be described.

  When only the priority order of the tag information is used, one or more text parts to which the priority order is assigned are extracted, and one or more text parts narrowed down based on the priority order are selected from the text parts. Before extracting keywords / topics, the text portion from which keywords / topics are extracted is narrowed down. For example, as described above, in the case of an HTML language, priority α1 (<TITLE>, <H1>, <H2>) and priority α2 (<H3>, <H4>, <H5>, <H6>) are selected, and the text portion with priority α3 is excluded from the keyword / topic extraction target (FIG. 3 S23).

  Keywords / topics are extracted by the keyword / topic extracting means 304 for one or more selected text portions (S24 in FIG. 3).

  From the keywords / topics extracted by the keyword / topic extraction means 304, the keyword / topic selection means 305 selects the keywords / topics used for the advertisement search, and the selected keywords / topics correspond to the address information of the advertisement posting website. Then, it accumulates (S25 in FIG. 3).

  The operation in S25 in FIG. 3 is the same as the operation described in S5 and S6 in the operation sequence in FIG.

  The subsequent operations are the same as S7 to S12 in the operation sequence of FIG.

  As described above, the method using only the priority order of the tag information not only obtains an accurate keyword / topic by narrowing down the text portion from which the keyword / topic is extracted, but also extracts the keyword / topic. / Reduced topic extraction process.

  Next, the operation in the case where both the priority of the tag information and the keyword / topic weighting obtained by the keyword / topic extraction means 304 are used will be described.

  In this case, the operations from S20 to S22 in FIG. 3 are the same as when only the priority order of the tag information is used.

  A text unit, which is a unit of text from which keywords / topics are extracted by the keyword / topic extracting means 304, is extracted from the text portion to which priority is given. As the text unit, the text part to which the priority order is assigned may be used as the text unit as it is, or the text parts having the same priority order may be combined into one text unit (26 in FIG. 3).

  For each extracted text unit, the keyword / topic extracting unit 304 extracts one or more weighted keywords / topics (S27 in FIG. 3).

  The keyword / topic selection means 305 selects a keyword / topic based on the priority in units of text and the weight of the extracted keyword / topic. For example, if the text unit priority is α and the keyword / topic weight is β, for example, α × β is calculated for all text units, and the required number of keywords in descending order of α × β is calculated. / Select a topic. Here, the higher the value of α, the higher the priority, and the higher β, the higher the weight (28 in FIG. 3).

  The selected keyword / topic is stored and managed by the keyword / topic management means 306 in association with the advertisement placement and the address information of the website (29 in FIG. 3).

  3 is the same as the operation described in S6 of the operation sequence of FIG.

  The subsequent operations are the same as S7 to S12 in the operation sequence of FIG.

  As described above, the method using both the priority order of the tag information and the weighting of the keyword / topic obtained by the keyword / topic extraction means 304 is compared with the method using only the priority order of the tag information. Since the keyword / topic weighting information obtained in 304 is also used, more accurate keyword / topic extraction can be performed.

  As described above, by using the priority of the tag information of the content to be advertised, or by using both the priority of the tag information and the weight of the keyword / topic extracted by the keyword / topic extraction unit 304 Thus, it becomes possible to extract keywords / topics that are more suitable for the content of the advertisement insertion target content.

  According to the embodiment described above, keywords / topics are extracted from the content of the advertisement insertion target content on the advertisement insertion website, stored in advance in association with the address information of the advertisement insertion target content, and the viewer performs the advertisement. When a request for access to the content to be posted is made, the advertisement is searched by a keyword / topic corresponding to the address information of the accessed content to be posted, and the content with the advertisement is provided to the viewer.

  Therefore, since the advertisement related to the content of the accessed content can be obtained for the viewer, it becomes easier to obtain information of interest, and more efficient for the advertiser and the administrator of the advertisement distribution server. Can provide a simple advertisement.

  In addition, priority is given to tag information of content to be advertised, keyword / topic weighting is given when keywords / topics are extracted from text information, and either or both of the given priority and weighting are given. By extracting keywords / topics for searching for advertisements using, it is possible to realize the extraction of keywords / topics that are more suitable for the content of the advertisement insertion target content.

  In addition, keywords / topics are extracted in advance from the content to be advertised on the advertisement publishing website and stored in advance in association with the address information of the content to be advertised. The search time for advertisements can be shortened as compared with the case where keywords / topics are extracted from the content to be advertised for each access.

1 is a block diagram of a system configuration example in the present embodiment. The operation | movement sequence diagram which shows the operation example of this Embodiment is shown. The flowchart for demonstrating the operation | movement at the time of the priority provision in this Embodiment is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Browser terminal 200 Advertisement insertion website 300 Advertisement distribution server 301 Advertisement insertion target website registration means 302 Advertisement insertion target content collection means 303 Text information extraction means 304 Keyword / topic extraction means 305 Keyword / topic selection means 306 Keyword / topic management Means 307 Keyword / topic search means 308 Advertisement database 309 Advertisement search means 310 Advertisement distribution means 311 Keyword / topic update means

Claims (7)

An advertisement distribution system comprising: an advertisement posting website for posting a distributed advertisement; an advertisement database for storing the advertisement; and an advertisement distribution server for selecting and managing the advertisement.
The advertisement distribution server
An advertisement insertion target website registration means for registering address information of the advertisement insertion website;
Advertisement posting target content collection means for extracting and collecting the content to be posted of the advertisement from the advertisement posting website by the address information;
Text information extraction means for extracting text information from the content;
A keyword / topic extraction means for extracting a keyword / topic for targeting the content from the text information;
Keyword / topic management means for storing and managing the keyword / topic in association with the address information;
A keyword / topic search means for searching for a corresponding keyword / topic from the keyword / topic management means based on address information of the advertisement posting website when an advertisement distribution request is issued from the advertisement posting website; ,
An advertisement search means for searching for and extracting a corresponding advertisement from the advertisement database based on the keyword / topic searched and extracted by the keyword / topic search means;
An advertisement distribution means for distributing the advertisement extracted by the advertisement search means to the advertisement posting website;
An advertisement distribution system comprising: Periodically monitoring whether or not the content of the advertisement posting website is updated, either when the content is updated or when there is a notification from the advertisement posting website that has updated the contents of the content In
The text information extraction unit extracts the text information from the updated content, and the keyword / topic extraction unit extracts the keyword / topic from the extracted text information.
Keyword / topic updating means for updating the keyword / topic associated with the address information of the updated advertising website based on the keyword / topic extracted by the keyword / topic management means The advertisement distribution system according to claim 1, further comprising: The advertising content collection means includes:
The advertisement distribution system according to claim 1, wherein when a lower-level website is linked to the advertisement-publishing website of the content, all of the linked websites are also collected. A keyword / topic selection means for extracting the weighted keyword / topic and selecting the keyword / topic from the keyword / topic based on the weight;
The keyword / topic management means includes:
The advertisement distribution system according to claim 1, wherein the selected keyword / topic is stored and managed in association with the address information of the advertisement posting website. The text information extracting means includes
In the case where the content collected by the advertising content collection means is at least a language using tags including HTML format and XML format,
When extracting the text information by deleting the tag from the content, a priority is given to the text portion surrounded by the tag according to the type of the tag,
From the extracted text part, select the text part that is narrowed down based on the priority,
The keyword / topic is extracted from the text portion by the keyword / topic extracting means,
The keyword / topic management means includes:
The advertisement distribution system according to claim 1, wherein the extracted keyword / topic is stored and managed in association with the address information of the advertisement posting website. In the case where the content collected by the advertising content collection unit is at least in a language using tags including HTML format and XML format, the text information extraction unit deletes the tag from the content and replaces the text information. When extracting, a priority is given to the text part surrounded by the tag according to the type of the tag, and comprises a keyword / topic selection means for extracting the text part given this priority,
The keyword / topic extraction means includes:
Extracting weighted keywords / topics for each of the extracted text parts of the priority or for the set of text parts of the same priority;
The keyword / topic selection means includes:
Selecting the keyword / topic based on the priority of the text portion and the weight of the extracted keyword / topic;
The keyword / topic management means includes:
The keyword / topic selected by the keyword / topic selection means is stored and managed in association with the address information of the advertisement posting website. Ad delivery system. A computer constituting an advertisement distribution system comprising: an advertisement posting website for posting a distributed advertisement; an advertisement database for storing the advertisement; and an advertisement distribution server for selecting and managing the advertisement. A readable advertising distribution program,
In the advertisement posting target website registration means, registering the address information of the advertisement posting website;
In the advertisement posting target content collecting means, extracting and collecting the content to be posted on the advertisement from the advertisement posting website by the address information;
A step of extracting text information from the content in a text information extracting means;
A keyword / topic extraction means for extracting a keyword / topic for advertising the content from the text information;
A keyword / topic management means for storing and managing the keyword / topic in association with the address information;
In the keyword / topic search means, when an advertisement distribution request is issued from the advertisement posting website, the keyword / topic management means searches the corresponding keyword / topic from the keyword / topic management means based on the address information of the advertisement posting website. When,
In the advertisement search means, searching for and extracting a corresponding advertisement from the advertisement database based on the keyword / topic searched and extracted by the keyword / topic search means;
In the advertisement distribution means, the step of distributing the advertisement extracted by the advertisement search means to the advertisement posting website;
And causing the computer to function.

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