A loyalty program is an incentive program that is offered by businesses to reward customers for their loyalty. It works like this: when you shop at a store (or online) that has a loyalty program, you can sign up to join. Then, every time you make a purchase at that store, you will get points or rewards. The more points or rewards you get, the more money off your next purchase you will get. So, it's kind of like getting your own discounts for shopping at the same store again and again.