Match On Action-

Match on action is used to show a switch of shots, that cuts to the action of what was happening in the previous shot and the purpose of it.This is effective because we're shown continuity of the action carrying on through out the scene and which makes it look slicker and gives a more expanded insight and open idea of what is going on. Rather than it being cut to two separate actions which wouldn't be as effective and be considered as a sign of bad editing.