This document discusses measuring the performance and impact of a Scrum Master through metrics. It proposes 15 potential metrics across three roles of a Scrum Master: facilitator, servant leader, and change agent. The metrics measure things like meeting efficiency, team happiness, waste reduction, and customer satisfaction. It recommends that Scrum Masters start measuring aspects of their work, gather and analyze the data, and use it to have conversations with their team, management, and other stakeholders. It also provides cautions that metrics should evolve over time and not be used punitively or to compare Scrum Masters.