When practicing the II-V-I progression, the circle of fifths should be treated, like a map, that helps you navigate your way from one key to the next, as you learn to play the II-V-I progressions in all twelve keys. Looking at the II V I progression: Dm7, G7, CMj7 in the key of C, you can see how the root notes of the sequence, move in the circle of fifths in a counterclockwise motion. Following the II-V-I in the key of C major on the circle bellow, you can place the II on any key in the circle and progress counterclockwise to the I of the new key. V – is G dominant seven (G7) (often called “seven”) To learn the II-V-I progression well, one should memorize that: It’s important to know that the natural chord qualities of the major scale degrees are always the same. It starts on the 2nd degree (II) followed by the 5th degree (V) and ending on the 1st degree (I) of major and minor scales. It is a sequence of three chords out of seven available for every key. Because of the importance of the II-V-I progression, jazz musicians beginners to advanced, often use it while practicing to improve their jazz melodic and harmonic skills If you hear anyone say that the II-V-I chord progression makes up the entire repertoire of jazz tunes, they’re not kidding! II-V-I is the most widely used chord progression in the vast repertoire of jazz standards. Mastering The Harmonic Language of Jazz Chords: The II-V-I Progression – Intro

Jazz chord progression piano chart