In a traditional coaching relationship, the coach is a professionally trained individual who offers their undivided attention to their client. The client is paying the coach for their service.
Peer coaching is a process whereby two people at a similar level take turns to coach each other during the same session, without paying each other. They have a basic understanding of the coaching principles and follow guiding frameworks to run their sessions.
The two are complementary – peer coaching often helps a person deepen their awareness of what they may need to tackle with a professional coach or a therapist.