How to put a mod in a mod folder using forge?

I have the mod and a sound pack for it is downloaded an forge is downloaded. It is my first time puting on any mod. Can i get some help. By the way it is minecraft if that helps. If you know how help!

Added (1). if i need more stuff tell me

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You can see how to install mod here http://www.8minecraft.org/optifine-hd-mod/. This is an example.