The B Major chord is a triad consisting of three notes: B, D#, and F#. It is built on the root note B and is commonly used in various music genres, including pop, rock, and classical. The chord has a bright and uplifting sound, making it a popular choice for songwriters. To play the B Major chord on a piano, you can find B on the keyboard and then play the D# and F# notes above it. On a guitar, the chord is typically played by barring the second fret and forming the shape of an E Major chord above it.