Truck won't start

[Jeremy_5]

I can't get my truck to start, the battery has been checked and I was told it is fine, it doesn't even crank over, all I hear is a click and that's it. I was wondering if someone could give me a run down on some simple things to check into. If the starter was bad wouldn't it try to crank? I was thinking it must be electrical. By the way what is the clicking noise I hear when I turn the key.