So LillytheVaporeon , you don't know how to tag, right ?

Okay, this'll be easy for me to teach you how to tag someone so that if you want to credit someone, they will notice.

First, you must type @

There, you will see a transparant words said "Mention the user" and there will be a loading circle below.

If you wait long enough, it'll appearing all of the user you follow, if you press one of it, you officially tag that user.

But if you want to find the user you want to tag faster, type their name or the part of their name that you remember.

Press that user and voila, you've tag them. Yeah, they are tagged when their name are gray.

This way, you can mention someone if there is something important or something.

I hope that helps, see ya.