**Cloud Functions in Firebase** Cloud Functions in Firebase allow developers to run backend code in response to events triggered by Firebase features and HTTPS requests. These functions enable automatic execution of custom logic, such as processing data changes in Firestore, responding to authentication events, or integrating with third-party services. With Cloud Functions, developers can create a highly scalable, serverless backend that supports real-time operations, enhancing the capabilities and performance of their applications without managing the underlying infrastructure.