Search Engine Optimization

タイトルまたは説明

Search engine optimization (SEO) is the process of affecting the visibility of a website or a web page in a search engine "natural" or un-paid ("organic") search results.[jargon] In general, the earlier (or higher ranked on the search results page), and more frequently a site appears in the search results list, the more visitors it will receive from the search engine users. SEO may target different kinds of search, including image search, local search, video search, academic search,[1] news search and industry-specific vertical search engines.

As an Internet marketing strategy, SEO considers how search engines work, what people search for, the actual search terms or keywords typed into search engines and which search engines are preferred by their targeted audience. Optimizing a website may involve editing its content, HTML and associated coding to both increase its relevance to specific keywords and to remove barriers to the indexing activities of search engines. Promoting a site to increase the number of backlinks, or inbound links, is another SEO tactic.

Optimization techniques are highly tuned to the dominant search engines in the target market. The search engines market shares vary from market to market, as does competition. In ***3, Danny Sullivan stated that Google represented about *5% of all searches.[*9] In markets outside the United States, Google share is often larger, and Google remains the dominant search engine worldwide as of ***7.[*0] As of ***6, Google had an *5–*0% market share in Germany.[*1] While there were hundreds of SEO firms in the US at that time, there were only about five in Germany.[*1] As of June ***8, the marketshare of Google in the UK was close to *0% according to Hitwise.[*2] That market share is achieved in a number of countries.

As of ***9, there are only a few large markets where Google is not the leading search engine. In most cases, when Google is not leading in a given market, it is lagging behind a local player. The most notable markets where this is the case are China, Japan, South Korea, Russia and the Czech Republic where respectively Baidu, Yahoo! Japan, Naver, Yandex and Seznam are market leaders.

Successful search optimization for international markets may require professional translation of web pages, registration of a domain name with a top level domain in the target market, and web hosting that provides a local IP address. Otherwise, the fundamental elements of search optimization are essentially the same, regardless of language.