Magnolia Author Instance
This is where authors work to create, edit, manage or delete content.
Reflects the actual state of the editorial content, not the public state of the content.
Usually located in a protected environment, not public to the outside world. Only one Author Instance can exist.
Magnolia Public Instance
Serves the content or pages to the public world.
A subscriber of an Author Instance, meaning it receives the content from an Author Instance.
No author works on a Public Instance. One or more Public Instances could exist.