semantic-conventions/docs/attributes-registry/deployment.md

Deployment

Deployment Attributes

Attribute	Type	Description	Examples
deployment.environment	string	Name of the deployment environment (aka deployment tier). [1]	staging; production

[1]: deployment.environment does not affect the uniqueness constraints defined through the service.namespace, service.name and service.instance.id resource attributes. This implies that resources carrying the following attribute combinations MUST be considered to be identifying the same service:

• service.name=frontend, deployment.environment=production
• service.name=frontend, deployment.environment=staging.