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Search engine optimization (SEO) is to improve the visibility of a website or web page inthe search engine’s ”natural”, or dutiable (“organic” or ”algorithm”), the search results.Under normal circumstances, the early (or higher on the search results page rank), more frequent site appears in search results list, the more visitors will receive from the search engine users. SEO may target different types of search, including image search, local search, video search, academic search, [1] the search of the press and industry-specificvertical search engines.
As Internet marketing strategy, SEO considers how search engines work, what people, the actual search terms or keywords entered into search engines and search engine of choice for searches of their target audience. Optimize a website may involve editing its content and HTML and associated coding to both increase the specific keyword and search engine indexing activities to remove obstacles. Promote increased websitebacklinks, or the number of inbound links, is another search engine optimization strategy.
Abbreviation of ”Issues by Listed Companies”, can refer to ”search engine optimization”,by the consultants to carry out optimization projects on behalf of clients, employees in theinternal implementation of a term of the SEO services industry. Search engine optimization can provide search engine optimization as part of an independent serviceor a broader marketing campaign. Because effective SEO may require changes in the HTML source code of the site and site content, search engine optimization strategy can be incorporated into web site development and design. The term “search engine friendly” can be used to describe web design, menus, content management systems, image, video, shopping cart, and other elements to optimize search engine exposure.

adapted from http://en.wikipedia.org/wiki/Search_engine_optimization