Tags: set once, access everywhere

Unified service tagging is an effective method of categorizing application components by using consistent tags across every application service, host, container, and more. Datadog's unified service tagging reserves three standard tags (env, service, and version) to automatically connect different data types in the monitoring platform, providing a single source of truth for monitoring data streaming from applications. This method simplifies the process of applying tags to all services once and using them everywhere (metrics, traces, logs, and profiles). It also helps identify problematic releases and their root causes with the version tag. Unified service tagging is flexible and can be applied in both non-containerized and containerized environments, such as Kubernetes, Docker, and ECS.