A light, open C variation with the 2nd ringing in place of the 3rd.
Load Csus2 onto an interactive fretboard, hear every note, and build it into a progression.
Play Csus2 in the Studio →A Csus2 chord contains the notes C, D, G. It is built from the suspended 2nd formula 1 - 2 - 5, with C as the root.
Neither, really — that's the point of a sus2. With no third, it isn't major (happy) or minor (sad); it sits in an open, floating middle ground. That ambiguity is exactly why it works as a colour chord: it adds interest without committing the progression to a mood.