"Using your feet to a spin bowler means you can get down to the pitch of the ball. It can also help you to get momentum into your shot or to simply put pressure back on to the bowler.
The key to coming down the wicket is to keep your head and eyes as still as possible throughout. If your head is bouncing up and down it is very difficult to focus on the ball. Ensure that you are still and balanced on point of contact with the ball."