Search engine is a pre define program which follow pre define instruction.
Search engine collect data form the internet and make easy a search to user to provide very fast and exact information . It only follow those word or keyword which you have
Put in your scroll bar. As you will put any word or keyword in scroll bar like(math).
Search engine search math in his own data base and show you fist that page where
Math word is so many time. It follow search only his own data base not in internet.
As it get information from the internet then it show in search or it can not so any web
Page which is not in his database.
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