Find the best piano lessons and piano practice buddy at HeyKiki and learn how to play piano. The piano is a musical instrument played with a keyboard, and is one of the most popular instruments in the world. The piano is used in many jazz and classical compositions for solo piano, ensembles, chamber music, and accompaniment. Piano lessons often include music theory lessons and instruction in reading sheet music. A distinguishing factor of the piano from other classical instruments is the ability to play chords, or multiple notes at once, with both hands, which allows for a solo player to provide his or her own accompaniment.