Search Engine is working for all web pages in below ways
- Search Engine crawls the complete website and fetches all urls from the web pages. If we talk about google then google performed this crawl by GOOGLEBOT.
- Search Engine create index for all the web pages and enter this information into own database. Whenever any user search any information then Search Engine sends the request to database indexing and fetch the result and displayed it to end user.
- There can be multiple result based on required search string. So Search Engine shows all result to end user based on rank of pages. This process is called calculation of relevant pages. Rank of pages means position of the page on search engine
Major Search Engines change their searching algorithm continuously sometimes multiple time in a day. and its done just because user should update their websites time by time.
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