John Frusciante of Red Hot Chili Peppers playing guitar Flickr photographer Chad Carson [CC BY-SA 2.0], via Wikimedia Commons
Pink Floyd's David Gilmour playing guitar Photo by Jan Hagelskamp1
Slash of Guns N' Roses playing guitar By Rockman - Own work, CC BY 3.0, Link
Guy playing scales on guitar
Man playing guitar chords

Chord Functions in the Major Keys

Chords within a given key have a function, or role they play within the key. Understanding these chord functions can help you understand why some chord progressions sound good while others sound not so good.

Jimmy Page riffs on guitar Image by Dana Wullenwaber
Applying arpeggios to guitar solos and fills
Guitarist adapting licks to each scale position
3 notes per string major scale
Playing pentatonic scales up and down the neck