After the major chords are mastered, players typically move on to minor chords followed by seventh chords, ninth chords and so on.
The chart lists most major chords divided by section (A-chords, B-chords, etc.). For those looking for more advanced chord options, the site also offers alternative chord views.
Seventh chords are full of tension and love to be resolved to major chords.
This poster has all the major chords you will need, and because it's hanging on the wall, you'll be able to keep playing while you look up at the chords.