G major is a musical key that is based on the note G. It consists of the notes G, A, B, C, D, E, and F#. This key is often associated with a bright and cheerful sound, making it popular in various music genres, including classical, pop, and folk. In Western music, the G major scale is commonly used for composition and improvisation. Many well-known pieces, such as Beethoven's "Ode to Joy," are written in this key. Musicians often find it easy to play in G major on instruments like the guitar and piano due to its simple chord structures.