Mobile apps that encourage users to share the app with their social network are known as "refer & earn" apps. With these apps, users can participate in referral prosatta king chratgrams and share a special code or link with others. When new users sign up using this referral information, the original user is rewarded with points, cash, discounts, or other incentives. Refer and earn applications are used by businesses as a word-of-mouth marketing tactic to grow their user base and boost brand awareness.