Barry Overeem, in his paper on the 8 Stances of a Scrum Master, describes the Scrum Master as a Coach, Teacher, Mentor, Facilitator, Change Agent, Impediment Remover, Manager, and Servant Leader.
While all eight stances are valuable, three of them form the bedrock of an effective Scrum Master: Coach, Teacher, and Mentor. These roles are often blended, but each serves a distinct purpose in helping teams grow and thrive.
The Scrum Master as a Coach