A "tune" is a sequence of musical notes that are arranged in a way that is pleasing to the ear. It can be simple or complex and is often the main melody of a song. Tunes can be found in various genres of music, from classical to pop, and are essential for creating memorable songs. Tunes can be played on different instruments, such as the piano, guitar, or flute. They can also be sung by the human voice. Composers and songwriters create tunes to express emotions, tell stories, or entertain listeners, making them a fundamental part of music.