When creating a discount code you choose between two types:
Percentage discount
Reduces the registration price by a percentage.
Value between 1% and 100% (the percentage cannot exceed 100%)
Example: a €30 fee with a 20% discount → final price €24
When to use it: early-bird offers, discounts for groups, launch campaigns.
A 100% discount equals a free registration for whoever uses the code.
Fixed-amount discount
Subtracts a fixed amount in euros from the registration price.
Example: a €30 fee with a €5 discount → final price €25
When to use it: simple, easy-to-communicate promotions ("€5 off with code CLUB"), agreements with groups for a specific value.
Which fees does it apply to?
In both cases you can make the code apply to all the event's fees or only to specific fees (individual or team). See Create a discount code.