A step-by-step exercise that helps you understand the importance of the first, fourth and fifth (1,4, 5 or I, IV, V) piano chords in major keys and helps you learn to find them instinctively on the piano keyboard.
1-4-5 is a one of many common piano chord progressions, particularly in early pop music and blues. 1 would stand for the root, so in the key of C, that's C,F,G.
