Why do you break boards in Tae Kwon Do?

Board breaking is an important part of training because it builds focus, power, technique, control, and accuracy; it also shows that you can preform the technique properly. I would recamend practicing with rebrakable boards, I like using them because you don't have to have a stack of would every time you want to practice. You also have to be very careful not to hurt yourself, because it is possible, if not easy, to break fingers/toes or even chip the bones in your knuckles. It's a good idea to start small, which is also another good reason to use rebrakable boards, because they have half board equivalents.