API integration is the process of connecting a cashback app to the APIs of merchant websites and affiliate networks. This allows the app to calculate cashback rewards, and track cashback transactions automatically. There are a number of benefits to API integration for cashback app development. First, it allows the app to be more efficient. By automating the tracking of transactions and calculation of cashback rewards, API integration can free up developers to focus on other aspects of the app. Second, API integration can help to improve the accuracy of cashback rewards. By connecting directly to merchant websites, API integration can ensure that the app is tracking all eligible transactions. Third, API integration can help to improve the user experience. By providing real-time updates on cashback rewards, API integration can make the app more user-friendly and engaging.