Addons Wont Work ,Help me someone?

Ok Yea ive been useing Steam since like, i dont know, 2 years? And ive got everything how to work everything that i play, but . …Garrysmod is kinda like. .wtf? Ok after seeing 5 videos on “How to install Addons” and i did everything the people did, n IT NEVER WORKED! out of 13 downloades 0 OF THEM WORKED! can someone take there time to help me out, if u need me right now, im stam ID thing is grayfox547, and my ID is Raptor jesus, thank you for you time, and help for reading this and helping me out,

Put them in your addons folder.