Chord riffs are created by combining different chords in a sequence. The chords are usually played in a regular rhythm, and the riff may be repeated several times throughout a song. Chord riffs can create a sense of momentum and energy in a song, and they can also be used to add texture and interest.
Some famous examples of chord riffs include the opening riff of "Smoke on the Water" by Deep Purple, the verse riff of "Kashmir" by Led Zeppelin, and the chorus riff of "Come Together" by The Beatles. Chord riffs are also used extensively in blues music, where they are often called "turnarounds."
Chord riffs are a versatile musical tool that can be used to create a variety of sounds and effects. They can be used to add drive and energy to a song, or they can be used to create a more relaxed and laid-back feel. Chord riffs are also a great way to experiment with different chord progressions and combinations.