The Suspended 2nd Chord (Sus2) is a triad that replaces the major or minor third with a major second. The notes are: root, major second, and perfect fifth. Its sound is 'open', 'bright', and 'ambiguous', as it lacks the defined major or minor character. It creates an inherent tension that desires to resolve, typically by returning to the third (major or minor) of the original chord. It is often used to add color, create a sense of anticipation, or to soften harmonies and give a sense of fluidity. It is common in pop, rock, folk, and orchestral music, where it can add a touch of modernity or a sense of melodic 'suspension'.