For the majority of high-handicap golfers the driver is the most difficult club in the bag to hit because it is the longest club and it has the least amount of loft. It will slice more often than not.
Pros set up with their spine tilted away from target at address, with the ball position more forward in the stance which helps them give the ball a more sweeping blow
As opposed to high-handicappers who may lack strength and mobility in spine and hips and set up too much on top of the ball at address which makes them hit down on the ball.
If you have marks on top on your driver because you have hit down on ball with driver and the ball position is too far back in your stance.