The new PMI PMP exam content came into effect January 2, 2021.
The old PMP exam was based largely on the 6th Edition of the PMBOK, which in turn is based largely on the Predictive project management methodology that many of us have been practicing for decades. This involves the 5 classic Process Groups (Initiation, Planning, Execution, Monitoring and Controlling, and Closing); and 10 Knowledge Areas.
The new PMP exam is based in part on the 6th Edition of the PMBOK but in about equal part on Agile/Adaptive project management methodology that is commonly used for IT projects. The Agile methodology was "codified" in the 2001 Agile Manifesto, and involves self-directed teams, a product manager and scrum master, depending on which type of Agile is being used. It is captured in PMI's Agile Practice Guide of 2017.
The content of the new PMP exam will be 8% Business, 42% People and 50% Processes, with half of the Process questions Predictive-based and half Agile-based. This is a dramatic change, with about 50% new content.
If you are interested in sitting for the PMP exam, there are instructor-led and on-line classes in a variety of formats (weekly classes, 5-day boot camp, at your workplace, online or at, for example, USI) for the new exam.