I love this view.  If you pay attention to the red line along the hips you can observe how on the photo to the right the right hip is a lot higher.  The left knee is flexing and the right knee is straightening.  This critical motion allows ALL players to increase their turn and remain centered.  The body’s weight starts 60% on the left foot in the left photo.  At the top of the backswing (right photo) the body’s weight is still over 50% on the left foot.  That is what is meant by weight forward.  The longest hitters of the golf ball start with most weight forward, keep the weight forward and then move it farther forward on the downswing.  Study this photo and it will help you understand how hit the ball farther and straighter.