We have not had any feedback from students who have taken the PMP exam in this regard. So I would have to say that it's an optional read.
However... be aware that that it is an official PMI global standard, and that questions for the PMP may come from many sources. But the big consideration is of course: How much time do you need to invest studying it <---> the actual chance of getting a question based on the standard on your exam.
My suggestion: If you already own a copy of the standard, then do take 2-3 hours of your time to skim through it and get a high-level understanding. If you don't own it, then don't worry about it.
The following user(s) said Thank You: Konstantinos Limas
Until Next Time,
Cornelius Fichtner, PMP, CSM
President, OSP International LLC
Moderators: Yolanda Mabutas, Ahmed Amin, Scott Gillard, Mary Kathrine Padua, ERIC BARTLETT, Gail Freedman, Kevin Nason, Steven Mudrinich, PMP, Mark Wuenscher, PMP, John Wolverton, Tracy Shagnea, PMP, Jada Garrett
This interview with Simona Fallavollita (LinkedIn Profile) was recorded at the magnificient Project Management Institute (PMI)® Global Conference 2017 in Chicago, Illinois. We discuss the how, what, why and when of the changes that are coming to the PMP exam.