Fewer trips to the till.
Take the order at the table, take the payment at the table, and let the guest who is in a hurry pay from their own phone.
The order goes straight to the kitchen.
What the waiter taps at the table prints in the kitchen. No paper slips, no orders lost between the two.
Guests who want to be quick, can be.
A QR code on the table lets guests order and pay themselves. No app to install, no account to create. Use it at lunch, turn it off at dinner.