Shotgun Skills:

Leading means shooting ahead of the moving target.

Leading is necessary when shooting at any moving target. If you shoot directly at a moving target, by the time the shot reaches that spot, the target will have already passed by. With correct leading, the shot and the moving target will reach the same spot at the same time. With practice, the leading will soon become automatic to you.

There are three commonly used methods of leading: swing through, sustained lead and snap shooting.