How Search Engine Works?
Search Engine is a program or a system which searches for a keyword which is inputted by the user and provides corresponding results (Information) to it. Search engines perform several activities in order to deliver search results. Crawling - Process of fetching all the web pages linked to a website. This task is performed by a software, called a crawler or a spider (or Googlebot, in the case of Google). Indexing - Process of creating an index for all the fetched web pages and keeping them into a giant database from where it can later be retrieved. Essentially, the process of indexing is identifying the words and expressions that best describe the page and assigning the page to particular keywords. Processing - When a search request comes, the search engine processes it, i.e. it compares the search string in the search request with the indexed pages in the database. Calculating Relevancy - It is likely that more than one page contains the s...
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