PDUs, or Professional Development Units, are vital for maintaining certifications like PMP (Project Management Professional). These units reflect ongoing learning and skill development in the field of project management. Earning 60 PDUs is a requirement for PMP certification renewal every three years. PDUs can be obtained through various learning activities, such as training, volunteering, attending webinars, or presenting at conferences. They ensure that certified professionals stay updated with the latest industry trends and best practices, enhancing their competence, and ensuring they remain a valuable asset in the dynamic world of project management.