CSM Certified ScrumMaster
"As a Certified ScrumMaster, you’ll have the training you need to
help your Scrum Team perform at their highest level. Through the
certification process, you’ll learn the Scrum framework and gain an
understanding of team roles, events, and artifacts. As the expert of
Scrum values, principles, and practices, the ScrumMaster protects
the team from both internal and external distractions."