How Search Engine Works?

Many of us are still unaware that Google that we are using in our daily life is actually a search engine. A search accepts the search term and returns various relevant results. This search terms is popularly known as keyword. There are many search engines like yahoo, bing etc that accepts keyword and return relevant results.

Whenever a user enters a keyword list of results are displayed on the search engine result pages. All this relevant results are yielded by a process that is:

• Crawling – Crawler or spider fetches all the web pages of all the websites. 
• Indexing – It than maintains index of all the fetched web pages and stores it in a database.
• Processing – When a keyword is searched it start searching the database with the help of index. 
• Calculating Relevancy – The relevancy of the indexed page is calculated with the help of particular algorithm.
• Retrieving Results – The best matched and the most accurate and relevant result is then yielded.  

These results are a list of website that has more relevant content. This website has the keyword and its related information and thus they get better place in a search engine.

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