While there may be many grip styles used by the best players in the world, there are certain commonalities of a functional golf grip and I wanted to put this thread together to help illustrate what those are.
If you found this thread by searching for information on the golf grip, welcome to our site, we have plenty of other great information HERE and make sure to JOIN, it's free! For any regular users of the site, hope this helps your game or confirms what you are currently doing with your grip.
Some pics to highlight some common mistakes
Big NO in the left pic, grip in the palm. Right pic, heel pad on top, grip in the fingers, it will automatically feel more secure.
General idea of how it should look
Anatomical snuffbox. If you shot a nail directly through the top of the wrist (in that little indentation underneath your thumb - the anatomical snuffbox) the nail should come out directly through the bottom of your wrist and into the center of the grip.
Most poor grips would have the nail come out the bottom of the wrist and miss the grip on the left side. This would indicate the wrist joint not sitting on top of the grip.
This is an important aspect of the grip because the incorrect position would assist in early club head throw away on the downswing, basically the wrist joint can't support the downward force of the club.
Two sides of the spectrum here. Too weak in the left pic, note the left hand isn't turned enough and the "nail" would be coming out of the left side of the grip. In the right pic, grip is too strong, left hand is rotated too much, lots of cup (dorsi flexion) in the lead wrist.
This next bit is more of a variation than a commonality, but I think it's beneficial and probably something new even for experienced golfers. Left pic, short lead thumb, right pic, long lead thumb. Make it easy on yourself and go with the long lead thumb. Greatly assists in the mobility of the wrist hinge on the backswing and downswing.
The placement of the trigger finger pressure point (first pad of your index finger just above the knuckle) is important. Too far under can cause the club face to appear too "closed", face aiming towards the sky at the top of the backswing. Too far on top can cause the face to rotate too far underplane on the takeaway.
Left pic, pressure point is "on top". Right pic is ideal, pressure point on the side or aft side of the grip.
Left pic, pressure point is "under", ideal on the right.
Another common mistake in the left pic, right thumb is running down the middle of the grip. A more functional position on the right, just the upper right "tip" of the thumb is in contact with the grip. Left pic position can contribute more to "casting" or losing leverage at too fast a rate.
The curvature of the rear hand fits into the base of the lead thumb.
Other than looking at your hand position, how do you know if your grip is in the palm of the lead hand? Take a look at some of these clues.
Left pic, the "V" of the rear hand is pointing at my sternum, should be aimed more towards my rear shoulder. In the right pic I haven't "loaded" my wrists enough, shaft angle is also too shallow. The shaft would be pointing outside the ball.
Since there is a lack of structure to the grip, the shaft "collapses" and gets close to my rear shoulder at the top of the backswing. From there I will have to uncock my wrist angles rapidly to get the club back down to the ball.
Golfers will also have a pattern of the location of the wear spot on their glove, under the heel pad, into the palm like the example below. The thumb can also get "shredded" pretty quickly due to the lack of stability in the hand.