What it is

A three-point stance is the position of a lineman before the snap. He crouches with two feet and one hand on the ground, making three points of contact.

In a game

It lets the player push forward with great force at the snap. The free hand is ready to block, strike or grab.

More detail

A four-point stance has both hands down, and it is used by linemen who need a strong push forward. Players in a two-point stance, standing up, can see more but start more slowly.