Understanding weight shift can be critical to helping a golfer swing freely and on the correct path and plane. Weight shift is also without doubt the most misrepresented fact in golf instruction. Let's discuss.
To understand weight shift we also have to understand the difference between "static" weight and "dynamic" weight.
To use the ground properly has been talked about for some time in golf. Using the ground correctly is not just pushing down and jumping upwards. If you want to learn power and control then this video is a must watch.
Maintaining clubface control through and beyond impact is a key to consistency and control. A lot of this control occurs from using the ground well. The better the ground connection the better the pivot activates.
Many people have tried- most have failed. Sam Snead squat move with his legs in the transition & downswing has long been praised and become like a "golden ticket' to chase.
Not every great golfer had a textbook swing. In fact there is a pretty strong argument that most of the great golfers had some kind of fault or idiosyncrasy in their swing.
A key to more speed and more control is to keep the body moving well beyond the strike- so the pressure of the swing is always intensified and the body is always moving faster than the release.