The document summarizes the key changes between the 5th and 6th editions of the PMBOK Guide. It notes that the 6th edition was released in 2017 and the PMP exam was revised in 2018. Some of the major changes include adding a section on Agile development practices, renaming two knowledge areas and processes for improved clarity, adding three new processes and removing one process, and including a new section on the role of the project manager.