A single workspace is enough for most organizations. One company, one workspace, every screen and playlist in the same place.
But a workspace is a wall, and sometimes a wall is exactly what you want. You reach for more than one when two parts of your work should stay completely apart: a parent company with distinct brands, a business with separate regional operations that have no reason to see each other’s screens, or an agency running signage for several clients who must never overlap.
Each workspace is its own world. Its screens, content, playlists, and people are its own. By default nothing crosses the wall: a playlist in one does not reach a screen in another, and content does not carry over on its own.
The wall is not absolute, though. When two workspaces genuinely need to work from the same thing, you can share it across them on purpose. A playlist, for example, can be shared from one workspace into another, so both run it without merging everything else. Sharing is the exception you choose, not the default.
So separation is what you get unless you ask for otherwise. Put the wall where your organization actually divides, keep it where the two sides have little to do with each other, and open a door only where they truly overlap.