The proper hip turn will increase you shoulder turn and clubhead speed!
If you walk down a driving range tee you will notice most amateurs move their right hip away from the target during the backswing. If you walk down a practice tee at a tour event you will notice that all of the player’s right hip is closer to the target at the top of the swing.
Many will say this is a reverse weight shift, it is not. The trail or typically right hip should start to move toward the target at about the halfway point in the back swing. This does not feel powerful like many-core golf swing fundamentals but it is.
This is not a move just for golf but is a basic athletic motion used in most sports, baseball, tennis, etc.
Next time you practice use an aiming stick or even a chair and position it against your right or trail hip. On your backswing make sure you create space from the stick or chair. This should take you about 30 swings before it feels relatively good.
One other benefit of this move is that it helps straighten the trail leg which allows the hips and shoulders to get a full turn. Later movement on the back swing will always feel powerful but it actually reduces your potential club head speed.
