Prismatic cohomology is a new theory developed by Bhatt and Scholze; see, for instance, these course notes. For the sake of the community, it would be great if the following question is discussed in this forum:
What is Prismaticprismatic cohomology and what is it good for?
Aside: According to Drinfeld, the name "Prismatic"prismatic cohomology" goes back (in part) to the picture used by the rock band Pink Floyd for the cover of the Dark Side of the Moon. See the relevant announcement here.