sus4 chords, often just called "sus" for short, are built with root, 4th, and 5th chord tones. The 3rd is suspended up to the 4th, that's what "sus4" means. Find these interactive diagrams at here: https://www.guitarthinker.com/lessons/open-sus-chords Very often in charts, especially modern worship, it will just show up as sus, and not necessarily sus4, which can cause confusion - ask me about this if not sure... The difference between these and add4 or add1 chords, is that the "sus" replaces the third of the chord with the 4th, whereas the add4 keeps the third and adds the 4th. Usually add11 works better especially in minor chords, because it may have enough separation from the third, normally a 1/2 step away, that it doesn't sound as dissonant. Questions?! If you do, let's get on a call and I'll demonstrate it for you... Don't forget to take this lesson's quiz and earn the badge for your GuitarThinker.com profile! #guitarlesson #guitarchords #guitarthinker #Intermediate Guitar Module #Music Theory Resources