With the basic theory out of the way, let's start learning some new chords! We start with the extremely common suspended 2nd chord (Sus2). These chords are extremely useful and everyone, from Ed Sheeran to Eddie Van Halen, loves to use them!
As with all chords, we simply need to learn the formula to be able to build the chord. In the case of Sus2 chords, we are talking about suspended 2nd chords. Suspended simply means that you take the 3rd note from a chord, suspend it (remove it) and replace it with a 2nd note instead. Therefore you get the formula 1st, 2nd & 5th from the major scale. Here is an example: