What is stealth camping?

Campsites that i have experienced in the United states all cost around 10-25 dollars a night. Now for the majority of would rather not have to spend that much would they? So stealth camping is setting up your campsite in a hidden fashion in whatever woods you can find to avoid paying for a tent site someplace else. Stealth camping could also refer to camping someplace not to avoid paying, but because you weren't allowed to camp there in the first place.