DADGAD tuning is an alternative guitar tuning that rearranges the standard tuning of the strings. In this tuning, the strings are tuned to D-A-D-G-A-D from the lowest to the highest string. This creates a unique sound that is particularly popular in Celtic music and fingerstyle guitar playing. Musicians often use DADGAD tuning to achieve rich harmonies and open chords. It allows for easier access to certain chord shapes and can inspire creativity in songwriting. Many guitarists appreciate this tuning for its versatility and the distinct tonal qualities it offers.