The right leg should drive forwards towards the target with the release and post impact. So why do a lot of golfers early extend and pop the right leg out towards the ball? Learn the magic of the right leg here in this video. You may even learn the Greg Norman- Scottie Scheffler shuffle.
Most golfers- even PGA Tour players- have habits they gravitate towards that can cause their swing to not perform as well. Nobody is immune to this.
Connection- Power- Force...How do they all tie in? 
The drill one 430 path drill stops the right arm from straightening- allows the body to open and turn- and keeps the golfer pushing force into the ground through the feet and legs. It also sets up the drill three post impact that keeps pressuring the shaft to the finish.
The end of the club is hidden by the hands but here is a visual drill that can help the golfer see and feel where the shaft should align to create consistent strikes on the ball. 
How do consistent ballstrikers get the clubhead to enter the ground at the precise point that allows pure contact. Watch and learn.