How search engine works
What is search engine? In simple words, search engine is a tool that finds results when someone searches the web. There is a search engine within our computers, which searches files, images etc stored within the computer, but search engine mostly refers to searches on the web. How search engine works on the web? To make a search, you give an input (type a query or submit a photo or say a query to voice assistant) and you expect the results to come out within a second. It is not possible for any program or tool to search the entire web (=world wide web) real-time in a few seconds because the web is enormously big and millions of searches are made every minute. So, what the search engine does is to make an index of webpages . It is like a list of webpage that the search engine believes are useful to answer search queries. For populating this index, a software (called search bot or web crawler ) keeps crawling the entire web all the time and whenever it finds som...