Mobile apps known as "refer-and-earn" apps provide incentives for users to share the app with their social networks. When users successfully refer new users, these apps offerholy rummy a variety of rewards, such as cash, gift cards, or discounts. Usually, the procedure entails users registering, getting a special code or link, & sharing it with others. The original user gets rewarded when a new user signs up through this referral. This referral model is a cost-effective marketing tactic that helps companies find new clients.