'''Search engine optimization''' ('''SEO''') is the practiceprocess of correctingimproving website code in order to improve a webpage'sthe visibility among search engines <ref>http://www.sempo.org/learning_center/sem_glossary#s</ref>, thus indirectly maximizing the volume or quality of traffic to a [[web site]] (such asor a [[blogWorld Wide Web|web]])frompage in [[search engine]]s via the "natural" or un-paid ("organic" or "algorithmic") [[Search engine results page|search results]]. as opposed to otherOther forms of [[search engine marketing]] ("SEM") which may deal withtarget paid inclusionlistings. TheIn theory is thatgeneral, the earlier (or higher on the page), and more frequently a site appears in the search results list, the more visitors it will receive from the search engine. SEO may target different kinds of search, including [[image search]], [[local search (Internet)|local search]], [[video search]] and industry-specific [[vertical search]] engines. This gives a web site [[web presence]].
As an [[Internet marketing]] strategy, SEO considers how search engines work and what people search for. Optimizing a website primarily involves editing its content and [[HTML]] and associated coding to both increase its relevance to specific keywords and to remove barriers to the [[web crawler|indexing activities]] of search engines.
