To be a good goaltender you must be an efficient skater. Your goaltender does not necessarily have to be the fastest skater on the team, but the best in terms of control and mobility. Pushes from post to post and ability to get quickly to plays laterally are essential for goalies to be able to perform at a high level.
Goaltenders must learn to push with strength and stop hard when needed. So when doing t-push or shuffle drills it is suggested that everything is done in sequence. Example: a coach should be calling out for the goalie to PUSH---STOP---PUSH---STOP---PUSH---STOP etc. giving one second in between pushes. This will give the goaltender time to recover and will keep him from developing bad habits by doing the drill too fast.
The ability for a goaltender to change directions quickly is also an absolute must as today’s game is a lot about trying to create a situation to get a goaltender moving in the wrong direction. In order to do this, and be effective, skating drills are a natural part of goaltender development.