SEO Basics

Google as a search engine uses web crawlers to crawl (visit and parse information) the websites and tries to make sure that the user searches are returning relevant information for the user. 

It mostly returns useful information for users. In order to do that, it checks the content quality and indexes and ranks pages based on quality. 

Read more on this – https://developers.google.com/search/docs/fundamentals/get-on-google