The concept of swinging through to a full finish is one that is lost on many amateur golfers. There is a common misconception in this game that anything which happens after impact really doesn't matter. That is not true at all. Even though the ball is already on its way to the target, your follow through and finish are still important in the big picture.

The way you finish your swing will tell you a lot about what happened leading up to that point, meaning your finish can help you get better over time. Also, swinging on through to a full finish is an indication that you accelerated the club properly through the hitting area.