How are automatically generated pages indexed?

Question

PHP

I am writing a cinema site, and I don’t understand a bit, for example, if you write the name of a movie and the site in Google FOR EXAMPLE: Watch Avatar cool site.com, then it will display this movie on this site in the search, but how did he find it at all if the page itself is generated by the backend , such as the name of the movie, a link to the movie in the player, picture, description, etc. are substituted. It's all taken from the database when the user directly follows the link. I apologize for the obviously stupid question, xs how else to understand.

Answer 1

You can tell the search engine about existing pages using the sitemap tool
https://developers.google.com/search/docs/advanced...
You can generate all possible links to pages on your site from the database and write them to a special file in a special format .

Answer 2

This is called indexing, a search engine robot, since the user enters the page and voila magic