Smart TV
Smart TVs are convenient but inconsistent
A smart TV browser can be a quick way to test signage, especially for one screen.
However, TV browsers differ a lot. Some are slow, limited or awkward to keep open after updates, restarts or power cuts.
Signage player
A dedicated player makes the screen behave more like signage
A digital signage player is designed to sit behind a TV or monitor and run the screen content consistently.
For menu boards, reception screens, waiting rooms and all-day displays, this can be cleaner than relying on the TV software.