A certification offered by the Scrum Alliance. The world’s first and by far most popular Scrum certification. This certification is intended for people who will fulfill the ScrumMaster role on a Scrum team, and is very often obtained by members of the development team. To earn CSM certification, a candidate must attend an in-person, two-day CSM training course taught by a Certified Scrum Trainer (CST). After successfully completing the class participants are eligible to take the on-line CSM exam, where they must correctly answer 24 of 35 multiple choice questions. Synonymous with CSM. See also CSPO, CSP, CST.