Scrum Master
In plain terms
A facilitator who helps a Scrum team work effectively.
Going deeper
The Scrum Master coaches the team on Scrum, removes impediments, and shields it from distractions, serving rather than directing. They enable the team's flow.
Under the hood
A servant-leader, not a project manager; focuses on process health and continuous improvement.
Examples
Scrum facilitation, removing blockers, coaching, servant leadership, Agile.
Think of it like...
Like a coach who clears obstacles so the team can play at its best.