What is the difference between the coupon code and the referral link?

The coupon code is a unique code that you can share with your audience to get a discount on their purchase at checkout. The referral link is a unique link they use to access our website and get binded to your affiliate ID to track challenge purchases. Both methods are valid to get credit for your referrals. Coupons are considered safer on referral tracking as user behaviour such as chaging device or browser will not affect the tracking.