A Buy X Get Y coupon rewards attendees who purchase a specified quantity of tickets by giving them additional tickets for free. For example: buy 2 tickets, get 1 free.
Go to Tickets → Promo-Discounts and click Create Coupon.
Click the Buy X Get Y card from the four discount type options.
The Y ticket is automatically set to free (no separate discount amount entry is needed).
Choose Code (manual or auto-generated) or Automatic.
Configure eligibility (all / specific group / specific ticket / specific customers), usage limits, and start/end dates in the same way as a standard discount coupon.
Note: Per-ticket redemption limits are not available for Buy X Get Y coupons.
Set the status to Enabled or Disabled, then click Save.
Buy 2 General Admission tickets → Get 1 VIP ticket free: