…in the downswing.
It gets you turning your shoulders around your spine, it keeps you from hanging back, coming too far from the inside, it gets your hips to open up, helps prevent hip thrust, keeps you from snatching it with your arms and hands, keeps you in posture, helps maintain tilt behind the ball, will keep you from casting much, will probably help avoid a flip at the bottom…I bet you can think of more.
It is an excellent feel to work on as a drill if nothing else.
If you want to say to me, “Monte, that is an over the top move for me.”
It is one of two things. You don’t have enough tilt behind the ball at address, or your shoulder turn is so vertical, a proper shoulder turn feels over the top.
If case #2 is true for you, you are in desperate need of this drill.