Backswing and Downswing Weight Transfer
Weight shift is a subject which is misunderstood a lot. Often when players are looking at their swings in a mirror or in a camera, they think for the weight to be shifting towards their right foot in the backswing, and the left foot in the downswing, they must see movement to the right and movement to the left.
Well generally speaking weight shift does not happen because of lateral movement. It happens because of rotation and force.