The web definition of the swing plane is most easily visualized as the plane of the shaft of the club or of the clubhead's arc during the swing.  Imperfect swing plane leads to errant shots. The golf swing plane training aids consider various factors that are involved in the swing plane movement. For example, some the arms and the wrists oriented golf swing plane training aids while others are more focused towards achieving correct positions.

Swing plane is now considered an important aspect of the golf swing. Earlier it was not given much attention.  Several factors influence the plane on which you swing. These could be your spine angle, forearm position, or knee drive, etc. The objective of the golf swing plane training aids is to help you attain a correct swing plane without worrying about its technical aspects much.

Some golf swing plane training aids are really helpful in assisting the golfer to accomplish a correct swing plane. While some swing plane training aids are inclined towards defining the swing plane from the front, others focus on establishing the swing plane from behind.