What is KDP?

KDP is Kindle Direct Publishing.  It is Amazon’s publishing platform.  Originally, it was split into Kindle Direct Publishing (ebooks) and Createspace was a separate entity, that could be connected.  Recently (2017), Amazon added a Beta paperback program in KDP’s platform.

KDP does not require exclusivity unless you use KDP Select.

See also KDP Select, DRM, Paperback (KDP Print), ISBN, ASIN.