Discount codes

A code takes a percentage off or a fixed amount off.

Limits that actually hold

Valid between two dates. A total number of uses. A number of uses per customer, so one person cannot spend the whole campaign. A minimum order value, so a code meant for a group booking is not used on a single ticket.

A code can be aimed at particular events or particular ticket types, which is how the student discount applies to the standing tickets and not the boxes.

What was used, and by whom

Every redemption is recorded with the customer, the booking and the amount taken off. That is the report that tells you whether the campaign paid for itself.