Answer: Loyalty program.
Explanation:
Loyalty program is a system of rewarding customers for their consistent patronage. A loyalty program could come as a coupon, rewards, free products, advance access to new products given to customers, it is an effective way of increasing revenue as customers are encouraged to come over and over again to make purchase.
When a company is having a loyalty program, customers get their personal information registered with the company and are given a means of identity which they use when making any purchase. Loyalty program is a means of rewarding customers for brand loyalty.