Content Moderation is a new experimental module

There is now a new experimental module in core called Content Moderation. This was, in large, a rename of the contrib module Workbench Moderation.

The Content Moderation module adds arbitrary moderation states to Drupal core's "unpublished" and "published" node states, and affects the behavior of entity revisions when entities are published. Moderation states are tracked per-revision; rather than moderating entities, Content Moderation moderates revisions.