Addressing help

I just need some help with the addressing system. Ive been trying to understand how it works but don’t understand how some of the symbols/characters work and how to use them. I read the documentation on addressing but still don’t really understand it that well. I need help understanding the urls too. If I could get something like a list or something basic to see what some of the things mean that would be great!

I do not know how to better explain it than the official manual:

Maybe if you can give an example of something that you need help understanding?

Nevermind lol. I figured it out.