You may use webhooks in numerous cases to ensure the automation of your promotional campaigns:
In response to coupon redemption Voucherify may send a ‘thank you’ email.
Voucherify may trigger webhooks with information that a customer should receive a referral reward and later on system can send an email or an in-app message informing the customer about the reward.
Send a discount coupon to a customer who abandoned the cart.
Automatically inform your customers about any changes in the campaign or time-limited discounts.