An augmented chord is a type of triad that consists of three notes: the root, the major third, and the augmented fifth. The augmented fifth is one half step higher than a perfect fifth, creating a unique sound that is often described as tense or unresolved. This chord is commonly notated as "aug" or with a "+" symbol. In music theory, augmented chords are frequently used in various genres to create a sense of drama or anticipation. They can lead to other chords, enhancing the emotional impact of a piece. Composers like Johann Sebastian Bach and Frédéric Chopin have effectively utilized augmented chords in their works.