The Data Synchronization Pattern in mobile application design involves ensuring that data across multiple devices or systems remains consistent and up-to-date. This pattern typically addresses the challenges of managing data when a device is offline or has intermittent connectivity. It uses strategies like background syncing, conflict resolution, and version control to keep local data in sync with remote servers or cloud services. When the device reconnects to the network, the app automatically synchronizes the local data with the server, ensuring that updates made offline are reflected online and vice versa. This pattern enhances user experience by ensuring data availability and consistency without requiring constant connectivity.