A static QR code is a URL baked into pixels. Print it, and it points at that page forever. A dynamic code points at a short link you control, so the printed code never changes but the destination can.
That unlocks a few plays. Point your window code at today’s openings during the day and at your booking page after close. Send a table-tent code to the menu on weekdays and the event calendar on weekends. Run a promo for ten days, then let it expire to your main page automatically.
The other half is measurement. Because every scan passes through your short link, you learn which placement earns scans, at what hour, and on which device. Move the quiet code, keep the busy one, and stop guessing.