In TGM it’s referred to as Pressure Point #3. A great way to mange length and direction on those critical approach shots. It’s the feel we all are striving for but never quite master. The old TGM gurus could tell you a lot about PP#3, it’s a shame they are no longer here.
From my experience, I have found that when I shank, its nearly always due to a flawed right arm/hand action, where the right dominates the left.
lose the pressure and voila you have flip,most of your communication skills are in your right hand (righties)