The Scrum Guide serves as a key reference to ensure that Scrum is implemented correctly. It outlines 3 pillars (transparency-inspection-adaptation), 3 roles (product owner-developers-scrum master), 5 events (daily scrum-sprint-sprint planning-sprint review-sprint retrospective), and 3 artifacts (product backlog-sprint backlog-increment) that define Scrum. However, following the guide alone is not enough. Successfully adopting Scrum requires an Agile mindset, a commitment to continuous learning and improvement, and embracing the core Scrum values.

Adapting to change is essential for building the right product and delivering high value (with value measurement being crucial) in a timely manner. Feedback loops from stakeholders and customers help the Scrum team meet their needs.

This infographic from Scrum.org summarizes key information about the PSM.