Getting the ball into the air is an essential skill for hitting satisfying shots that travel any significant distance. While it seems as though it should be an easy task, as the angle of the club will naturally angle the ball into the air when it contacts it, many players struggle because they do not allow the club to do the work in raising the ball.
Understand that the key to getting the ball to go up in the air is to hit down on it, and that shots along the ground are signs that you are not getting down enough with your club. A snubbed ball is caused by the club already beginning to swing up from the ground at contact, causing the front of the club to hit the ball instead of the face.
Repeat the process, aiming to send your club through the same divot every time. If your divot continues to move backward, it is a sign that you are hitting behind the ball, and likely striking the ball with the front edge of the club instead of the face, which is why you are topping or skulling your shots.