The "Dadd9" chord is a type of guitar chord that combines the notes of a D major chord with an added ninth note. It consists of the notes D, A, and E, creating a rich and open sound. This chord is often used in various music genres to add color and depth to a progression. To play a Dadd9 chord on the guitar, you typically place your fingers on the second fret of the A string, the third fret of the B string, and the second fret of the E string. This simple finger positioning allows for an easy transition between chords while maintaining a full sound.