Firebase is a comprehensive suite of cloud-based tools developed by Google for building and managing mobile and web applications. It provides services like real-time databases, authentication, analytics, and cloud storage. Firebase simplifies backend development by offering ready-to-use solutions for user authentication, data syncing, and push notifications. Its integration with Google Cloud allows developers to scale applications easily and handle large user bases. Firebase also supports real-time collaboration and provides detailed app performance insights, making it a popular choice for mobile developers looking to quickly deploy feature-rich applications.