Using your hands correctly is one of the most fundamental things you can do to help improve your game - it's your only connection with the club and the way that you place your hands and the amount of pressure you use will always directly affect how you hit the ball. There are a few different ways that you can hold the club, so we've outlined three of the most common ones.
The Vardon Grip is also known as the Overlapping Grip and was first made popular by Harry Vardon in the early 20th century. It's one of the most widely used grips today, and if you've ever taken lessons in the game then it's probably the first grip that your instructor taught you to use. In this position, your trailing hand's little finger should be placed in between the first and second fingers of the lead hand, with the thumb underneath fitting snugly across the palm. This grip is a good one to use for amateurs and pros alike, because it forces you to grip the club mostly with the fingers instead of the palms - which will enable you to hit further and more accurately.
The Interlocking Grip is famously used by professionals such as Tiger Woods and Jack Nicklaus. Although it's popular among weaker players and beginners, its main downside is that it tends to promote too much use of the palms - which is bad for any player because it can cause you to slice the ball. With this grip, the little finger on the trailing hand is interlocked with the index finger on the lead hand, and then - like the Vardon Grip - the thumb tucks in underneath. If you have small hands then this could be a good one to use, because the hands are really tightly locked together without any fear of slipping - so you can grip tightly without needing to apply too much pressure.
Third, the Baseball or Ten Finger Grip is the rarest method, and generally isn't taught as much by instructors. This is because it tends to promote a very tight grip on the club which can jeapordise your control over the ball. However, it can be a good one to use for those with weak fingers or painful joints - some beginners favour this style of grip because it's an easy one to learn. The technique is simply to allow the little finger of the trailing hand to lie right up next to your other hand's index finger, with the thumb again running along the lifeline of the trailing hand's palm.
So now you know all about the three main golf grips, it's up to you to decide which one works best for you. The main thing to remember is not to apply too much pressure whichever grip you use and to ensure that the fingers, instead of the palms, do most of the work.