Targets
Use Environments, Groups and Saved Targets to reuse Silo selections in Bridge.
Use Bridge → Targets to organise reusable Site selections for Policies and Deployments.
Environments
Use Environments for broad lifecycle placement such as Production, Staging, Development and Test. Custom Environments can be added when your workflow needs another clearly named stage.
Groups
Groups are explicit Site lists. Use them when the same set of Sites needs to be selected repeatedly regardless of Environment.
Saved Targets
A Saved Target stores a reusable selection for later Policy or Deployment authoring. Give it a clear name that describes the operational purpose of the selection.
Changing membership
Review where a Target is already being used before changing or deleting it. Policies follow the current Target membership, while an existing Change Set keeps the Site selection it recorded when it was created.