How do I get the downloads on Garry's Mod?

I know HOW to download things from garrysmod.org, but how do I put the downloads on the game?

Extract them with winRAR or 7zip
copy the folder that was created and paste it into your addons folder.

You can put them in the Garrysmod or Addons folders…

Make sure you use WinRaR too

Usually people pack instructions in the .rar or .zip files
If you don’t have a program to open those files, I recommend using http://www.7zip.com/
If you open it and don’t see any instructions, hit me up on steam and I’ll help you out.