Tap dance is characterized by the sound of your tap shoes hitting the floor as a percussive instrument.  With your shoe as an instrument, tap is commonly considered a form of music on its own.  Rhythm (Jazz) tap and Broadway tap are the two major families of tap today.  Broadway tap focuses more on the dance and is widely performed within the musical theater. Rhythm tap focuses more on musicality, and its practitioners consider themselves to be a part of the Jazz tradition. Tap dance has roots most famously in Irish stepdancing, and also in dancing such as the Juba Dance and English Lancashire Clog dancing.