What do i do after i activated my steam key?

i got my key and did what it said it said that it successfully activated the key… but what now? where do i go i looked all over steam for it. Im sorry if someone has already made this thread! but i just am really confused if someone could help that would be great! Thanks!

Restart Steam if you can’t find it.

I just did that thank you very much!
and everyone ignore this thread from now on Jthesloth helped me out.