The most important part of the golf swing is the grip.  Without it, you have nothing.

There are three basic grips.

1. Baseball grip aka Ten Finger grip.  As the name suggests..all ten fingers are on the grip, much like that of holding onto a baseball bat.  This is the basic grip taught to most beginners.  I would not recommend it, as it leads to shaft spinning.  Shaft spinning occurs when the hands rotate during the takeaway and downswing.  It is difficult to keep the initial face angle of the club square through impact.
2. Interlocking Vardon Grip.  For a right handed golfer, the left hand is placed towards the butt end of the club.  The thumb is pointed down the center of the shaft, the right hand is then placed on-top of the extended thumb while the ‘pinky’ finger is interlocked with the index finger of the left hand. The three remaining fingers are used to grip the club, and the thumb for the right hand is used to stabilize the club using a pinching motion.  The inside portion of the right thumb presses against the club.
3. Overlap Vardon Grip.  Same as above, but the ‘pinky’ finger rests atop of the left hands index finger.

I have a neutral overlap grip. I overlap due to my large hands.

There is a fourth grip, which is taught by Natural Golf.  I do not have positive information, and have omitted it, not to say that it couldn’t be used.

And believe it or not, there is a fifth grip.  The left hand low (for a right handed golfer).  Now some people call this cross handed, which think about it…it would be very awkward to cross hand a golf club.  I have seen the left hand low grip ONCE.  His name is Josh Broadway, and he plays amazing!  I played a Mini-Tour event with him and….he flat out can move the ball.  I hurt myself trying to swing using his grip….

Check your grip.  Which of the three do you use?