What is a user agent in a browser and is it removed when clearing cookies, cache and all other browser data?

Question

Browsers

If it is not removed, then how to do it? Change it, reset it?
What kind of data is generally included in the user agent? I was offered, for example, 1000 unique user agents. It's like - 1000 different versions of the browser?

Answer 1

The user agent is the browser: its version and build. There are extensions that replace it, you can use them.