Search engine optimization (SEO) is the process of improving the visibility of a website or a web page in search engines via the "natural" or un-paid ("organic" or "algorithmic") search results. Other forms of search engine marketing (SEM) target paid listings. In general, 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, video search and industry-specific vertical search engines. This gives a website web presence.
Search engine optimization is the technique of enhancing the visibility of a web site in the eyes of the search engines. People type their queries in the search engine search box for information and for other transactions. They will be averse to search the information by scrolling through all the results pages. By way of search engine optimization, the web site will be listed on the top positions in the search engine results page and hence receives more traffic. This is accomplished by researching on the keywords typed by various internet users all over the world and targeting on the optimal key word phrase. The design, content and the HTML tags of a web site have to be modified according to the regulations set by the major search engines. Yahoo, Google and MSN are the search engine giants.