Not quite the right way of thinking about it.

curl is a program that can be used from a terminal.

Servers are often interacted with via URLs.

curl is just one of many tools for interacting with them.

If you have access to a terminal with curl installed I would suggest running man curl and having a read of the output.

Alternatively it can be read here:

https://www.man7.org/linux/man-pages/man1/curl.1.html

I've see your other posts now and I've come to the conclusion you are trying to figure out how to browse the web via a terminal.

In the biz we call this an https://xyproblem.info/

You were never going to get a satisfying answer with your question.

A better one would have been "how do I browse the web with a terminal"

And people would have directed you to search for things like "terminal browser"