How Search engines work?
Search engine → crawlers, spiders, robots, bots → crawl website pages → make its copy →save websites in its database (data centers) → indexing, indexation
A user searched on Google → Google shows results from its database

How to know whether my website is crawled/indexed or not?
Google search operator → site:websitename.com
How can we get our website crawled/indexed in Google?
- Google automatically crawls/indexes websites via social media links
- Manually request Google to Crawl/index my website via Google Search Console
How many times does google crawl/index our website?
Crawling frequency
- Website Popularity
- Website updates (freshness)