Tap is a type of dancing shoe attachment that is used to create a rhythmic sound when the dancer's feet hit the floor. It is made up of metal plates that are attached to the bottom of the shoe and create a tapping sound when the dancer moves. TAP dancing is a popular form of dance that has been around since the early 1900s and is still popular today. TAP dancing is a great way to express yourself and can be used in many different styles of dance.