At the risk of sounding overly simplified – the grip is one of the most important fundamentals any golfer should learn. So important that Arnold Palmer’s father put his hands on the club and told him not to move them. Jack Nicklaus would return to his teaching professional every year for a fundamental tune-up. It’s that important!
I am not going to try and describe the grip to you; you need a PGA Professional to show you in person how to put your hands on the club properly. However I will say this: the grip is your only connection to the club and therefore, the primary factor influencing whether or not the club face will be square at impact. At first, the proper grip may not “feel” comfortable – but the ball does not care. If you get the grip right, the clubface has the best chance to get square at impact.