What is a Search Engine?

The word search engine would refer to such a tool that would help a person while searching for some type of material. Several companies design its coding these days and various types of search engines are available in the market. It is used to help a user to retrieve information about any desired topic. The search engine works like a web directory and sifts through out the entire World Wide Web to find relative information pieces. The most famously used search engine these days includes names such as Google, Yahoo, and MSN. Apart from these wide range search engines there are smaller level search engines that are applied to web site that search for information within that website.