With the keywordsearch in the search engine of Google and the like, they are various techniques in order to make the Web sight of specification indicate in higher rank of the search result of optional search word. Or, when the marketing technique that is said, it increases the access of Internet user to that specific sight with that it is.

The search engine which the search sight mounts outputs the search result which differs respectively depending upon each company individual algorithm and the database. The - - where you analyze, whether these search engines what higher rank it indicates in standard you have on the search result of the search engine have an influence the Web sight which becomes the retrieval object on the basis of that construction/by tuning in optimum shape, actualizes superior indication is SEO. However, if algorithm of the search engine because it is modified frequently, does not continue to do either analysis or sight tuning always, directly the effect is said that it is gone.

When today, Internet user has become generally "the Web sight regarding something is searched", utilizing the search sight. The majority of those users,among the searchresults which are indicated in the search result page, accesses only superior ones. The chart those which are not shown even similarity are said also that it does not exist on Internet to first several pages of the search result.

Because of that, the existence impression on Internet of the suffering search sight is raised, SEO is seriously considered very as the method of increasing actual access. In the United States, it was recognized from early on as an expedient of Internet promotion which exceeds the former Internet announcement of the banner and the like. 2002 it reaches the point where halfway it is observed from extent in US, the many SEO consulting enterprise from now on that has been born.