Sheet music refers to written or printed musical notation that is designed for a specific instrument, such as piano, violin, guitar, etc. It includes all the necessary information about the melody, harmony and rhythm of a song, including notes, rests, tempo markings, dynamics, articulations, and other indications to help performers play the piece accurately. The term "sheet music" can also refer to a single page of written music or an entire collection of printed musical compositions bound together in a book.