The box squat is an amazing tool when learning how to squat for the first time. It enforces you to learn how to push your hips back and how to hit the correct depth, depending on mobility.
With that said, it's not just for beginners. Some of the best squaters in the world just box squat year round, such as many Westside Barbell athletes. So, don't think that once you have the box squat down you don't need to do it anymore.
Check out our quick video about how to setup the box squat: