Trap shooting has it's original roots in Great Britain. It was a method of shooting targets instead of live pidgeon which was banned.

A shotgun shell made for the game of trap shooting.

Double trap shooting is where the thrower throws 2 rocks at the same time instead of just 1.

In trap shooting you always shoot at a target that is moving away from you, while skeet shooting has targets coming at you, moving away, and going right past you.

Clay pigeon shooting, or some call it trap shooting is the reason for clay targets being used. Many people use trap shooting or clay targets to better their hunting skills.