ONE OF THE MAIN ELEMENTS OF A GOOD SWING IS A CORRECT AND EFFICIENT PIVOT OR COIL.
In fact it would be safe to say
that the pivot is the hub or engine room of the golf swing.
What this involves is having an good understanding of how the upper thoracic (rib cage and shoulders), the mid section (pelvis) as well as the lower body (knees and below) act and then reacts as the body pivots back and through around the spine, the bodies longitudinal axis.
So to help create a simple image and understanding of how the bodies pivot operates. Here are a couple of examples of 'winding up' in order to create a more automatic release with speed and timing, when letting go.
Following on from these images is a drill designed to both test and ensure what we are doing is correct and that our body can in fact move as we want it to.