MongoDB Atlas has introduced a new resource tagging functionality that allows users to organize and manage database deployments with improved efficiency. Tags are key-value pairs associated with resources to provide additional context, enabling better work with various tools and integrations. Resource tags can be used for cost management, resource management, security risk management, operations management, and automation. Users can create tags in the Atlas UI or using the Atlas CLI, and manage them using the Admin API. To get started with resource tagging, it is recommended to follow best practices such as avoiding sensitive information, using a standard naming convention, defining a strategy for mandatory tags, and using automated tools. Resource tagging provides a simple way to organize database deployments at scale, enabling features like cost allocation reports, automation scripts, and security compliance issues detection.