Docker is a widely used tool in the developer community, providing a simple and efficient way to package and deploy applications. To protect data when running an application in Docker, it's essential to back up three types of data: container data at runtime, application configuration, and storage for application data. Named volumes are considered a best practice for managing storage in Docker, offering persistence, shareability, and ease of management across different hosts. To build a robust data protection strategy, backing up Docker volumes is recommended, with tools like SnapShooter providing comprehensive backup and restore capabilities for Docker-based applications.