Mobile browsers - what is transmitted to search engines when searching?

Question

Mobile development

What information does the mobile browser transmit to the search engine when interacting with the search string, issuing it, and when "walking" around the site?
Are there good materials?

Answer 1

https://habrahabr.ru/company/oleg-bunin/blog/321294/
on mobile, correct for plugins, etc. but they are smarter