What is a Search Engine?
A search engine is a program that searches for and identifies items in a database that correspond to keywords or characters specified by the user, used for finding particular sites on the World Wide Web.
Google Search is the dominant search engine in the United States market, with a market share of 65.6% as of 2009. Google is an American multinational technology company that specializes in Internet-related services and products. Google was founded in 1998 by Larry and Sergey Brin while they were Ph.D. students at Stanford University, in California. Google indexes billions of web pages, so that users can search for the information they desire through the use of keywords and operators.
Google started off as a project that evolved from a two-man enterprise to a multibillion-dollar corporation in less than a decade. In 2007. the company surpasses Microsoft as the most visited site on the Web. Practically every webmaster wants his or her site listed high on Google's search engine results page.
Google's search engine is a powerful tool. It uses a special algorithm to generate search results. It uses automated programs called spiders or crawlers, just like most search engines. What sets Google apart is how it ranks search results, which in turn determines the order Google displays results on its search engine results page. Google uses a trademarked algorithm called PageRank, which assigns each Web page a relevancy score.