JP2009230227A - Advertisement server and advertisement keyword retrieval method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for retrieving a keyword without interpreting characters when character codes with the content of a Web page and the keyword of the advertisement respectively recorded therein are coincident. <P>SOLUTION: An advertisement server includes: a keyword recording means for recording the keyword concerning the advertisement with the use of one or more character codes; a character code recognizing means for recognizing the character code with the information concerning the Web page recorded therein; a keyword reading means for reading the keyword recorded in the keyword recording means with the use of the character code being the same as that which is recognized by the character code recognizing means; and a keyword determining means for determining whether the keyword is included in the Web page or not by comparing the information concerning the Web page with the keyword through the use of the character codes. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an advertisement server and an advertisement keyword search method.

  When an advertisement is placed on a Web page, there is a so-called content matching method that analyzes the content of the content and displays an advertisement in accordance with a keyword described in the content (for example, Patent Document 1). At that time, a search is performed to determine whether or not the keyword defined for the advertisement is included in the Web page.

  On the other hand, since web pages are recorded with various character codes, and advertisement keywords are also recorded with predetermined character codes, the character codes of both companies may not necessarily match. As representative character codes, there are ISO-2022-JP (JIS), Shift_JIS, EUC-JP, UTF-7 (Unicode), UTF-8 (Unicode), and the like.

JP 2005-242753 A

  Therefore, when searching for whether or not an advertisement keyword is included in the web page, the content character is interpreted based on the character code recorded in the web page, while the advertisement keyword is the same. It is necessary to interpret characters and to search based on the characters.

  According to this method, even if the character codes of both do not match, there is an advantage that the search is possible because the characters are interpreted and compared, but on the other hand, it is necessary to perform a process of interpreting both characters. It was. Therefore, an object of the present invention is to provide a technique of searching for a keyword without interpreting characters when the character code in which the content of the Web page and the keyword of the advertisement are recorded matches.

  The present inventor has found a mechanism that, when the character code recorded in the Web page content and the advertisement keyword respectively matches, the character code is compared without interpreting both characters. It came to complete. Specifically, the present invention provides the following.

  (1) Keyword recording means for recording a keyword related to an advertisement with one or more character codes, character code recognizing means for recognizing a character code recorded with information related to a web page, and the character code recognizing means Keyword reading means for reading out the keyword recorded in the keyword recording means with the same character code as the character code, information on the Web page and whether or not the keyword is included in the Web page and the keyword as the character code An advertisement server comprising: keyword determination means for determining by comparing with each other.

  According to such a configuration of the present invention, whether or not a keyword related to an advertisement is included in a Web page is determined based on whether or not a keyword recorded in the same character code as the information related to the Web page is recorded in advance. Since it is possible to select and compare the recorded keyword information, it is not necessary to interpret both characters, and the comparison can be performed at high speed without changing the character code. Also, the processing load on the server can be reduced.

  (2) Keyword recording means for recording a keyword relating to an advertisement with a predetermined character code, character code recognizing means for recognizing a character code in which information relating to a Web page is recorded, and the keyword recorded in the keyword recording means A keyword reading means for reading out, a character code determining means for determining whether or not a predetermined character code recorded with the keyword matches a character code recognized by the character code recognizing means, and the character code determining means Character code conversion means for converting the keyword into a character code recognized by the character code recognition means when it is determined that the two character codes do not match, and whether or not the keyword is included in the Web page To compare the information related to the Web page and the keyword with the character code The ad server, which includes a keyword determining means for determining, the Ri.

  According to such a configuration of the present invention, it is determined whether or not the character code in which the keyword related to the advertisement is recorded matches the character code in which the information related to the Web page is recorded. Since the keyword related to the advertisement is converted into the character code in which the information related to the web page is recorded, whether the keyword related to the advertisement is included in the web page or not can be compared with the character code. The effect similar to that of the invention of (1) can be exhibited even if the keyword is not recorded in advance with several kinds of character codes.

  (3) The keyword determination unit compares the keyword and the information related to the Web page while shifting a part for comparing the information related to the Web by shifting the length of the keyword by 1 byte. The advertisement server according to (1) or (2).

  According to such a configuration of the present invention, whether a keyword related to an advertisement is included in a Web page, whether the keyword and the information related to the Web page are compared with information related to the Web page, Since the comparison is performed while shifting by 1 byte at a length, the search omission is not caused.

  (4) The information on the Web page further includes index data creating means for creating different index data by extracting the character code of the keyword length while shifting by 1 byte, and the keyword determining means The advertisement server according to (1) or (2), wherein index data is compared with the keyword.

  According to such a configuration of the present invention, instead of directly comparing the content of the Web page and the keyword, the character code of the keyword length is extracted while shifting the content of the Web page by 1 byte, and the different index data Therefore, the reference part of the Web page is compressed for the overlapping part, and the processing time can be shortened. In particular, when a comparison process is performed for a plurality of keywords having the same keyword length, since the index data once created can be used, the effect of shortening the processing time is great.

  (5) The advertisement server according to (4), wherein the keyword determination unit rearranges the index data in a predetermined order and compares the index data with the keyword.

  According to such a configuration of the present invention, the index data can be rearranged so that, for example, the character codes are in ascending order and compared with the keyword, so that high-speed comparison processing such as a binary search method can be performed. As a result, the processing time for comparison can be greatly shortened.

  (6) When there are a plurality of advertisements for which the keyword is determined to be included in the Web page by the keyword determination means, the advertisement selection means for selecting one advertisement based on a predetermined rule is further provided. The advertisement server according to any one of (1) to (5).

  According to such a configuration of the present invention, when there are a plurality of advertisements that include a keyword in a Web page, one advertisement can be selected based on a predetermined rule. A conventional advertisement selection method can be used.

  (7) A character code recognition step in which the keyword related to the advertisement is recorded with one or more character codes, and the server recognizes the character code in which the information related to the Web page is recorded, and the server recognizes the recognized character A keyword reading step for reading the keyword recorded with the same character code as the code, and the server compares the information on the Web page with the keyword based on the character code to determine whether the keyword is included in the Web page. And a keyword determination step for determining the advertisement keyword.

  According to such a configuration of the present invention, since the invention described in (1) can be realized using a server, the same effect as in (1) can be exhibited.

  (8) The keyword related to the advertisement is recorded in a predetermined character code, and the server recognizes the character code in which the information related to the Web page is recorded, and the server stores the recorded keyword. A keyword reading step for reading, a character code determining step for determining whether or not the character code in which the keyword related to the advertisement is recorded matches the character code in which the information related to the Web page is recorded, and When it is determined that the character code in which the keyword related to the advertisement is recorded does not match the character code in which the information related to the Web page is recorded, the server records the information related to the Web page as the keyword. A character code conversion step for converting to a character code; Advertisement keyword search method and a keyword determining step of determining by whether the compared character code and the information relating to the Web page keyword included in the.

  According to such a configuration of the present invention, since the invention described in (2) can be realized using a server, the same effect as in (2) can be exhibited.

  According to the present invention, in a content matching method for displaying an advertisement in accordance with a keyword described in content of a Web page, whether or not the keyword related to the advertisement is included in the Web page is not interpreted. Since the comparison can be made with the character code as it is, the processing load can be reduced and the processing speed can be increased. Further, by using a so-called N-gram method in which the comparison is performed by shifting the length of the keyword by one byte at a time, at the character code level, there is no omission of search and a highly accurate search can be performed.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. This is merely an example, and the technical scope of the present invention is not limited to this.
(First embodiment)

[Overall configuration of ad server]
FIG. 1 is a diagram illustrating an entire configuration of a Web page DB in which information related to an advertisement server and a Web page is recorded.

  The advertisement server 1 receives a web page read request from the user, reads web page reading means 2 from the web page DB 15, and character code recognition that recognizes the character code in which the read web page is recorded. Means 3, keyword recording means 10 in which an advertisement management table including keywords is recorded in one or more character codes, and keyword reading means 4 for reading out an advertisement management table corresponding to a designated character code from the keyword recording means 10; , Keyword determining means 8 for comparing and determining whether or not the keyword is included in the Web page at the character code level, and an advertisement for selecting an advertisement to be posted when there are a plurality of advertisements including the keyword in the Web page And selecting means 9.

  The web page DB 15 is a database in which information related to each web page is recorded. Reading of information related to the web page from the web page DB 15 may be performed by a server other than the advertisement server 1, but in the present embodiment, it is performed by the advertisement server 1.

[Advertising server hardware configuration]
FIG. 2 is a diagram illustrating a hardware configuration of the advertisement server 1 according to the present embodiment. The advertisement server 1 includes a CPU (Central Processing Unit) 31 (a plurality of CPUs such as a CPU 32 may be added in a multiprocessor configuration), a bus line 20, a communication I / F (I / F: interface) that configure the control unit 30. ) 33, a main memory 34, a BIOS (Basic Input Output System) 35, a display device 36, an I / O controller 37, and an input device 38 such as a keyboard and a mouse.

  The control unit 30 is a part that controls the advertisement server 1 in an integrated manner. By appropriately reading and executing various programs stored in the hard disk 40 (described later), the control unit 30 cooperates with the hardware described above, and Various functions are realized.

  In the communication I / F 33, the advertisement server 1 receives a web page read request from a browser (not shown) via the Internet (not shown), or inserts an advertisement into the read web page and transmits it. If it is a network adapter. The communication I / F 33 may include a modem, a cable modem, and an Ethernet (registered trademark) adapter.

  The BIOS 35 records a boot program executed by the CPU 31 when the advertisement server 1 is started up, a program depending on the hardware of the advertisement server 1, and the like.

  The display device 36 includes a display device such as a cathode ray tube display device (CRT) or a liquid crystal display device (LCD).

  A storage device 42 such as a hard disk 40 and a semiconductor memory 41 can be connected to the I / O controller 37.

  The input device 38 accepts input by the administrator of the advertisement server 1.

  The hard disk 40 stores various programs for causing the hardware to function as the advertisement server 1, a program for executing the functions of the present invention, and a table to be described later. The advertisement server 1 can also use an external hard disk (not shown) as an external storage device. The web page DB 15 described in FIG. 1 is recorded on an external hard disk.

  Although the hardware configuration of the advertisement server 1 has been mainly described above, the functions described above can be realized by installing a program in a computer and causing the computer to operate as the advertisement server 1. Therefore, the function realized by the advertisement server 1 described as an embodiment in the present invention can be realized by executing the above-described method by the computer, or by introducing the above-described program into the computer and executing it. It is feasible.

  The computer in the present invention refers to an information processing device including a storage device, a control unit, and the like, and the advertisement server 1 includes an information processing device including a storage device 42, a control unit 30, and the like. The processing device is included in the concept of the computer of the present invention.

  The control unit 30 mainly corresponds to the Web page reading unit 2, the character code recognition unit 3, the keyword reading unit 4, the keyword determination unit 8, and the advertisement selection unit 9, and the storage unit 42 corresponds to the keyword recording unit 10.

[Record keyword information by character code]
FIG. 3 is a diagram showing a character code keyword correspondence table. This represents the correspondence between the character code and the file name of an advertisement management table (described later) recorded on the keyword recording means 10 for each character code. The character code is, for example, Shift_JIS or EUC-JP, but is displayed as code1 and code2 here. It shows that the advertisement management table is recorded on the keyword recording means 10 with a file name of ad0001 with the code code of code1 and with a file name of ad0002 with the character code of code2.

[Ad management table]
FIG. 4 is a diagram illustrating an advertisement management table. FIG. 4A shows the data recorded with the character code code1 (file name is ad0001). FIG. 4B shows the data recorded with the character code code2 (file name is ad0002). Both have the same content, except that the recorded character codes are different.

  For example, an advertisement with an advertisement ID A has “car” as a keyword, but the character code “code1” is represented by 3 bytes as “8A5C6B”. On the other hand, the character code code2 is represented by 4 bytes as “013F6BF0”. Here, A to F are 10 to 15 in hexadecimal notation.

  Other information in the advertisement management table is similarly recorded in the respective character codes, but display at the character code level is omitted. Hereinafter, the advertisement management table will be described.

  Each advertisement is identified by an advertisement ID. In this example, three advertisements with advertisement IDs A, B, and C are registered.

  For each advertisement, there is a priority index for determining the priority of placement. The priority index may be anything, but in this example, the contract amount is used as the priority index. Depending on the contract amount, the publication probability is allocated. Therefore, if other conditions are the same, if the contract amount is doubled, the publication probability is also doubled.

  The position represents a place where an advertisement in the web page is to be posted.

  The keyword represents a word that should be included in the Web page, which is a condition for placing the advertisement. That is, the advertisement of A needs to include the word “car” specified by the keyword on the Web page as a condition for posting. If the word “car” is not included, the advertisement for A will not be posted. Similarly, the advertisement of C needs to include the word “car” on its Web page as a condition for posting. In this example, the number of keywords is one, but may be two or more.

  The link represents a URL that is accessed when an advertisement posted on a Web page is clicked. Indicates where the ad content is located. Described in HTML.

  The display content represents display content for displaying the advertisement as a banner advertisement.

[Keyword search]
Here, a description will be given of how to perform a keyword search for placing an advertisement on a Web page when there is a request to read a Web page.

  First, the advertisement server 1 reads the web page requested by the user from the web page DB 15. Here, the advertisement server 1 functions as Web page reading means 2.

  Next, the advertisement server 1 recognizes the character code used in the web page. The character code is described in the meta tag in the head element in the HTML document. Here, the advertisement server 1 functions as the character code recognition means 3.

  When recognizing the character code, the advertisement server 1 refers to the character code keyword correspondence table (FIG. 3) and grasps the file name of the advertisement management table described in the character code. Then, the advertisement management table (FIG. 4) recorded on the keyword recording means 10 with the file name is read out. Here, the advertisement server 1 functions as the keyword reading means 4. Now, assuming that the character code of the Web page is code1, the advertisement management table with the file name ad0001 is read. In the following description, it is assumed that the character code of the Web page is code1.

  Next, the advertisement server 1 compares in order at the character code level whether or not the keyword is included in the information related to the Web page. The comparison at the character code level is because any character code can be compared without interpreting the characters if the information is expressed by the same character code. Therefore, processing can be performed with the same algorithm regardless of the character code, and comparison can be performed at high speed.

  FIG. 5 is a diagram showing information to be searched for the Web page in character codes. This is an HTML document that describes a Web page, excluding tags and the like, and extracting a portion showing substantial contents. In the character code level, 0 to 9 or A to F is displayed in hexadecimal.

  The keyword of the advertisement record registered at the top of the advertisement management table is “8A5C6B” (3 bytes) in character code. Therefore, the character code “E35B948A5C6B7C94985C9D9F5B...” That is a comparison target of the Web page is compared with the character code being shifted one byte at a time from the head.

  FIG. 6 is a diagram showing a state of comparison. As can be seen from this figure, “8A5C6B” matches at a position shifted by 3 bytes from the head. This means that the keyword of the advertisement with the advertisement ID A is included in the web page. Hereinafter, similarly, the keywords of advertisements with advertisement IDs B, C, etc. are compared. Here, the advertisement server 1 functions as the keyword determination means 8.

  Here, if there is one ad that has a keyword hit, the ad may be posted on the web page. However, if more than one ad that should be placed in the same position is hit, any ad is posted. You have to make a choice.

  In this example, the keyword is hit in both advertisements with advertisement IDs A and C. In this case, the selection between A and C is made based on the priority index (contract amount). Since A has a contract amount of 4 million yen and C has a contract amount of 1 million yen, the posting probabilities are 0.8 for A and 0.2 for C. Therefore, a random number between 0 and 1 is generated, and if it is 0.8 or less, A may be selected, and if it exceeds 0.8, C may be selected. Here, the advertisement server 1 functions as the advertisement selection means 9. In this way, advertisement is posted on the web page.

(Second Embodiment)
In the first embodiment, in order to compare the Web page information and the advertisement keyword at the same character code level, the advertisement keyword is recorded in advance with a plurality of character codes, and the read web page is requested. Based on the character code, the keyword recorded with the corresponding character code was grasped and compared.

  However, in the second embodiment, the keyword (that is, the advertisement management table) is recorded only with any predetermined character code, instead of recording the keyword with a plurality of character codes in advance. When the character code of the web page requested to be read is different from the character code of the keyword, a method of comparing the character code of the keyword into the same character code as the character code of the web page will be described.

  In addition, in the first embodiment, the comparison method directly compares the character code of the keyword with the character code of the target portion of the Web page. However, in the second embodiment, the keyword code is calculated from the character code of the target portion of the Web page. A method of extracting a character code having a length of 1 as index data and performing comparison using the index data will be described.

  Note that, in the following description and drawings, the same reference numerals are given to portions that perform the same functions as those in the first embodiment described above, and redundant descriptions are omitted as appropriate.

[Overall configuration of ad server]
FIG. 7 is a diagram showing an overall configuration of the Web page DB in which information related to the advertisement server and the Web page is recorded.

  The advertisement server 1 has the keyword recording means 10, but unlike FIG. 1, only one type of advertisement management table is recorded here with a predetermined character code. Therefore, the keyword reading means 4 does not read with the file name determined according to the character code, but with the file name determined from the beginning. The character code determination unit 5 determines whether or not the predetermined character code in which the advertisement management table is recorded matches the character code in which the Web page recognized by the character code recognition unit 3 is recorded. If they do not match, the character code conversion means 6 converts the keyword into the character code of the Web page. If they match, no conversion is necessary. The index data creation means 7 extracts and generates character code-based index data of the keyword length from the target portion of the Web page, and records it in the index DB 11. The keyword determination means 8 compares the index data recorded in the index DB 11 with the keyword. Then, according to the comparison result, the advertisement selection means 9 selects an advertisement to be posted on the Web page.

[Keyword character code conversion]
FIG. 8 shows an example in which the keyword “car” recorded with the content “8A5C6B” in the character code code1 is converted into the expression content of the character code code2. This is because the keyword is recorded in advance with the character code code1, and since the read web page is created with the character code code2, the character code level cannot be compared as it is. The content is converted. However, in any case, there is no change in representing "car". Conversion of the character code can be easily performed by using a character code table (not shown).

[Web page content indexing]
When the content of the comparison target part of the Web page is “E35B948A5C6B7C94985C9D9F5B...” At the character code level, index data of an arbitrary length can be extracted from this. In a method generally called the N-gram method, data of a predetermined length is extracted while shifting one byte at a time from the head of the target data.

  FIG. 9 is a diagram illustrating an index data extraction method. FIG. 9A shows the contents of the target portion of the Web page at the character code level. FIG. 9B shows the contents in units of 1 byte. FIG. 9C shows a 1-byte index data extracted therefrom. Data extraction starts from the beginning and shifts by 1 byte. Here, the left side is the extracted data itself, and the right side is the rearranged data in ascending order. Similarly, FIG. 9 (d) shows an example in which 2-byte index data is extracted, FIG. 9 (e) shows an example in which 3-byte index data is extracted, and FIG. 9 (f) shows an example in which 4-byte index data is extracted. Extracted. In any case, when the same index data is extracted, one is left and the other is deleted. This is because one index is sufficient for comparison.

  Since the content of the keyword after converting the character code is “013F6BF0” (4 bytes), 4-byte index data (FIG. 9F) is extracted and compared with the rearranged data. The comparison may be performed directly, but the comparison with the rearranged one can be performed at high speed because the binary search method or the like can be used.

  In this way, when indexing and comparing, it is not necessary to extract the same index data for overlapping parts, so the number of index data can be compressed. it can. Also, once indexed, it is efficient because other keywords having the same keyword length can be used. Therefore, in this embodiment, the index data is extracted according to the length of the keyword. However, considering the comparison with a plurality of keywords, first, the index is appropriately changed by changing the length. A plurality of types of data may be extracted. Note that the selection of advertisements is the same as in the first embodiment, and is therefore omitted.

[flowchart]
Finally, FIG. 10 shows a processing flow of this embodiment.

  S1: The control unit of the advertisement server 1 reads a web page that has received a read request from the user from the web page DB 15. Here, the advertisement server 1 functions as Web page reading means 2.

  S2: The control unit of the advertisement server 1 recognizes the character code used in the read web page. Here, the advertisement server 1 functions as the character code recognition means 3.

  S3: The control unit of the advertisement server 1 reads the advertisement management table from the keyword recording means 10. Here, the advertisement server 1 functions as the keyword reading means 4.

  S4: The control unit of the advertisement server 1 determines whether or not the character code recorded with the keyword matches the character code recognized in step 2 (S2). Here, the advertisement server 1 functions as the character code determination means 5. And when both correspond (S4: Yes), it progresses to step 6 (S6).

  S5: When the two do not match (S4: No), the control unit of the advertisement server 1 converts the character code of the keyword into the character code of the Web page. Here, the advertisement server 1 functions as the character code conversion means 6.

  S6: The control unit of the advertisement server 1 extracts the character code based index data of the keyword length from the target portion of the Web page. Here, the advertisement server 1 functions as index data creation means 7. If necessary, the extracted index data may be rearranged in ascending order.

  S7: The control unit of the advertisement server 1 compares the index data with the keyword. Here, the advertisement server 1 functions as the keyword determination means 8.

  S8: The control unit of the advertisement server 1 selects an advertisement to be posted according to the result of the comparison. Here, the advertisement server 1 functions as the advertisement selection means 9.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

It is a figure which shows the whole structure of Web page DB in which the information which concerns on the advertisement server which concerns on 1st Embodiment, and a Web page is recorded. It is a figure which shows the hardware constitutions of the advertisement server which concerns on 1st Embodiment. It is a figure which shows the character code keyword corresponding | compatible table which concerns on 1st Embodiment. It is a figure which shows the advertisement management table which concerns on 1st Embodiment. It is the figure which represented the information used as the search object of the web page which concerns on 1st Embodiment with the character code. It is the figure which showed the mode of the comparison with the web page and keyword which concern on 1st Embodiment. It is a figure which shows the whole structure of Web page DB in which the information which concerns on the advertisement server which concerns on 2nd Embodiment, and a Web page is recorded. It is a figure which shows the example which converted the character code of the keyword which concerns on 2nd Embodiment. It is a figure which shows the extraction method of the index data which concerns on 2nd Embodiment. It is a figure which shows the processing flow which concerns on 2nd Embodiment.

Explanation of symbols

1 advertising server 20 bus 30 control unit 42 storage device

Claims (8)

A keyword recording means for recording a keyword related to an advertisement with one or more character codes;
A character code recognizing means for recognizing a character code in which information relating to the web page is recorded;
Keyword reading means for reading out the keyword recorded in the keyword recording means with the same character code as the character code recognized by the character code recognition means;
Keyword determining means for determining whether or not the keyword is included in the Web page by comparing the information related to the Web page with the keyword using a character code;
An advertising server comprising: A keyword recording means for recording a keyword related to the advertisement in a predetermined character code;
A character code recognizing means for recognizing a character code in which information relating to the web page is recorded;
Keyword reading means for reading out the keyword recorded in the keyword recording means;
Character code determination means for determining whether or not the predetermined character code recorded with the keyword matches the character code recognized by the character code recognition means;
A character code conversion unit that converts the keyword into a character code recognized by the character code recognition unit when the character code determination unit determines that the two character codes do not match;
Keyword determination means for determining whether or not the keyword is included in the Web page by comparing information related to the Web page and the keyword with a character code;
An advertising server comprising:   The keyword determination unit compares the keyword and the information related to the Web page while shifting the portion for comparing the information related to the Web by shifting the length of the keyword by 1 byte. The advertisement server according to claim 1 or claim 2. Index information creating means for extracting the character code of the length of the keyword while shifting the information about the web page by 1 byte and creating different index data, respectively.
The advertisement server according to claim 1, wherein the keyword determination unit compares the index data with the keyword.   The advertisement server according to claim 4, wherein the keyword determination unit rearranges the index data in a predetermined order and compares the index data with the keyword.   The advertisement selecting means for selecting one advertisement based on a predetermined rule when there are a plurality of advertisements determined by the keyword determining means to include the keyword in the Web page. The advertisement server according to any one of claims 1 to 5. The keyword related to the advertisement is recorded with one or more character codes,
A character code recognition step in which the server recognizes a character code in which information on the web page is recorded;
A keyword reading step for the server to read the keyword recorded with the same character code as the recognized character code;
A keyword determination step in which the server determines whether the keyword is included in the Web page by comparing the information related to the Web page with the keyword using a character code;
Advertising keyword search method with The keyword related to the advertisement is recorded with the specified character code.
A character code recognition step in which the server recognizes a character code in which information on the web page is recorded;
A keyword reading step for the server to read the recorded keyword;
A character code determining step in which the server determines whether or not the character code in which the keyword related to the advertisement is recorded matches the character code in which the information related to the Web page is recorded;
When it is determined that the character code in which the keyword related to the advertisement is recorded does not match the character code in which the information related to the web page is recorded, the server records the information related to the web page as the keyword. A character code conversion step to convert the character code to
A keyword determination step in which the server determines whether the keyword is included in the Web page by comparing the information related to the Web page with the keyword using a character code;
Advertising keyword search method with

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