Getting your ball to spin when rolling down the alley will increase your strike potential. Getting the ball into the pocket at just the right angle will send the pins the direction necessary to alleviate splits and knock out the corner pins. How you hold and release the ball will determine how well the ball hooks.
When you hold the ball, your arm should be at a 90 degree angle. Your palm should be facing up with the ball resting on the palm. For the right handed bowler, your thumb should be in the ball pointing to the 10 or 11 o’clock position. For left hander bowlers it will be the 1 or 2 o’clock position. During the release how you bring your hand out of the ball will impact how well the ball spins.
Thumb must come out of the ball first. Once the thumb is out, lift up with your fingers as they come out of the ball. Continue your swing upward. Follow-thru will increase the hook potential. Follow-thru will get the ball rotating instead of sliding down the alley. A properly rotating ball will snap into the pocket once it gets through the oil on the lane.