How is a Scrum Master in Scrum defined?

The Scrum Master coaches team members in self-management and effectiveness of collaboration. They support the achievement of the Definition of Done goals and the desired increments. The Scrum Master ensures that the Scrum Team can pursue its goals undisturbed. The Scrum Master ensures that the Scrum events take place positively, productively and within a time window or timebox. He ensures the effective definition of the product goals and the organization of the product backlog and thus supports the Product Owner. He makes sure that the task list is clear and concise. He supports the planning of the product based on measurable results (empirical approach). He tries to mediate between Scrum teams and stakeholders. The Scrum Master advises the organization in the planning and implementation of the project management Scrum.