MongoDB has introduced several new features, including Data Federation, Search, Device Sync with Flexible Sync, and Change Streams, aimed at reducing complexity in data management for developers. These features enable developers to build richer experiences by streamlining operations, simplifying data integration, and accelerating analytics. Atlas Data Federation allows users to write a single query to work with multiple sources, while Atlas Search provides rich search functionality directly into applications. MongoDB Atlas Device Sync helps address mobile app data challenges, including limited connectivity and sync conflicts, using Flexible Sync for faster and more seamless syncing. Change Streams enable developers to build event-driven applications that react to data changes in real-time.