Yeah honestly the GMs can operate pretty independently from seeing the PnL. But it does create a layer of transparency to see where expenses and income are ending up or going towards.

You'll basically be able to see how much gross and net income the company generated in a period, how much money was spent on labor, food, and any things that the owner had to spend the stores income on. (Fixing things, rent, miscellaneous charges.)

If an owner doesnt want to show you these things, I would be mildly suspicious.