Based on your question, it appears that you are looking for a referral code. A referral code is a unique identifier that is used to track a customer's referral source. It allows businesses to reward customers for referring their friends or family to their products or services. Referral codes are typically provided by businesses to existing customers who can then share the code with their friends and family. By using the referral code, the referred customer can receive a discount or other incentive when they make a purchase. Referral codes are a great way for businesses to increase their customer base and grow their business.
