SEO is short for search engine optimization or search engine optimizer.Search engine optimization is a methodology of strategies, techniques and tactics used to increase the amount of visitors to a website by obtaining a high-ranking placement in the search results page of a search engine (SERP) -- including Google, Bing, Yahoo and other search engines.
Search Engine Optimization (SEO)
SEO helps to ensure that a site is accessible to a search engine and improves the chances that the site will be found by the search engine.
SEO is typically a set of "white hat" best practices that web-masters and Web content producers follow to help them achieve a better ranking in search engine results. Search Engine Land's Guide To SEO explains the ranking factors in more depth, in a tutorial providing tips and advice on implementing them