A Scrum Master is a facilitator in the Scrum framework, which is used in Agile project management. Their primary role is to help the Scrum team understand and implement Scrum practices effectively. They ensure that the team follows the Scrum process, removes obstacles, and fosters a collaborative environment. In addition to supporting the team, a Scrum Master also works with the Product Owner to ensure that the product backlog is well-defined and prioritized. They promote communication and transparency within the team and with stakeholders, helping to create a productive and efficient workflow.