Even if you are new to Scrum, you may have heard of a role called the ScrumMaster. The ScrumMaster is the team's coach, and helps Scrum practitioners achieve their highest level of performance.
In the Scrum process, a ScrumMaster differs from a traditional project manager in many ways, including that this role does not provide day-to-day direction to the team and does not assign tasks to individuals.
A good ScrumMaster shelters the team from outside distractions, allowing team members to focus maniacally during the sprint on the goal they have selected.