A slice occurs when the trajectory of the ball after the shot strongly curves from left to right (or from right to left in the case of left side player).
Usually, a slice can occur when the angle of the clubface is too open on impact as it strikes the ball along the trajectory on which club head moves.
On the other hand, the “hook” occurs when the clubface is closed at impact and the swing might be inside out. Sometimes this is the result of rotating the wrists too soon in the swing or of not following through on the golf shot. A hook can also be caused by too strong of a grip. With a hook, the ball will spin in a counter-clockwise direction
The so called hook affects a reduced percentage of players, normally the ones with low handicap or professional golfers. With the hook the ball will spin on the left usually for an exaggerated hands‘ rotation during impact (Picture 7), which is caused by a too strong grip and also by a swing direction going to far to the right.