The Scrum checklist is an informal tool to help teams get started with Scrum or assess their current implementation. It outlines various Scrum practices and categorizes them as core, recommended, or optional. The checklist is not meant to be used prescriptively but can help teams identify areas for improvement by discussing which practices they do or do not follow and why. It is intended as a guide rather than a rulebook and emphasizes that teams can experiment and tailor practices to their needs.