Golf is about mastering every skill. Controlling path is one of the most powerful skill sin the game.
Here is an overview into the different sections of grip as well as what role each section serves in hitting more consistent shots.
The hands are the only point of contact that we have with the shaft. If we understand grip as well as practice gripping correctly, then we maximize our control over the clubface.
Here is a deeper look at how to create a bridge, why you do that, as well as an overview on the role of the right hand in gripping the club.