What is Search Engine???
Search engines are programs that search documents for specified keywords and returns a list of the documents where the keywords were found. A search engine is really a general class of programs, however, the term is often used to specifically describe systems like Google, Bing and Yahoo! Search that enable users to search for documents on the World Wide Web.How it works???
Search engines have two major functions - crawling & building an index, and providing answers by calculating relevancy & serving results.to know more watch the video:
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