The primary role of a Scrum Master in agile development is to facilitate the Scrum process, ensuring that the team adheres to agile principles and practices. The Scrum Master acts as a servant leader, removing obstacles that may hinder team progress and fostering collaboration among team members. They guide meetings, such as daily stand-ups and sprint reviews, and help the team maintain focus on achieving their goals. By coaching and supporting the team, the Scrum Master plays a crucial role in improving productivity and ensuring successful project outcomes.