Shift to the Left
As you chip, you are always trying to get your feet to roll to the left. This gets your weight shifted to the left so that you’ll have more of a downward movement into the back of the ball. Most importantly, this will encourage you to get solid impact.
Because of the downhill lie, your body has to be very angled to the left and your hands are forward in order to reach impact. This drill reinforces good habits in your chip shots.
Chipping off a downhill lie encourages you to stay down through the impact zone. This creates a solid impact into the back of the ball.