What is a reservation card?

Advance order is a kind of card (such as restaurant, hotel, etc.). Sometimes the real thing is similar to a business card, and some pictures are taken directly online. Usually, the store's specialties will be printed on the reservation card and preferential terms will be given. How many people order more than one meal, or students order a meal at a discount. To put it simply, he is a business card and a publicity, but it is not a person's reputation, but a simple epitome of a hotel or restaurant. It is also possible to improve the reputation of the hotel or something!