Search Engine is a program that indexes documents, then attempts to match documents relevant to the users search requests. It hunts your site for words that describe your page and index your page based on how many times such words are used on your page. So if your page is about "hosting", the search engine will index your site. Popular search engines include Google®, Alta Vista®, Ask Jeeves®, Excite, Hotbot, Lycos® and Yahoo!®. Search engines are also a tool to market your Web site to potential visitors.