The Project Management Body of Knowledge (PMBOK) is a comprehensive guide that outlines best practices, standards, and guidelines for project management. It serves as a framework for managing projects effectively and efficiently, covering various knowledge areas such as scope, time, cost, quality, and risk management. Developed by the Project Management Institute (PMI), the PMBOK is regularly updated to reflect the evolving nature of project management. It is widely used by project managers and organizations to ensure successful project delivery and to enhance the skills and competencies of project management professionals.