What does a restaurant loyalty program look like from my customer's side, start to finish?

They order once, and a few hours later they get a WhatsApp inviting them to add your loyalty card to their phone. Every completed order earns a stamp under the rule you set on Marketing → Loyalty & stamps: per order, per amount spent, or per qualifying dish. The card on their phone shows the live count and updates itself when a stamp lands. When the card is full they get a reward, either as a single use code on WhatsApp or applied automatically at their next checkout on their own number. If you set locations, their phone shows your message when they pass one of them. A restaurant loyalty program here needs nothing printed and nothing installed. The Loyalty & rewards tab in the docs walks through the setup.