Question

how search engine works

Answer 1

Web Crawling. This is the means by which search engines can find out what is published out on the World Wide Web. ...

Indexing. Once a spider has crawled a web page, the copy that is made is returned to the search engine and stored in a data center. ...

The Algorithm.

I hope this helps you.

Answer 2

Every search engine has three main functions:
1. Crawling (to discover content),
2. Indexing (to track and store content), and
3. Retrieval (to fetch relevant content when users query the search engine).