You can use tagging to group target servers for organized deployments.
About this task
By using tags and filtering, you can separate resources that
represent production servers into two logical groups. If you tag half
the resources with a blue tag and half with a green tag, then you
can run deployments in a fashion that is sometimes called blue-green
deployment. When you plan to deploy a new version of an application
to a production environment, deploy it to the blue group first. Meanwhile,
the green group of servers still provides the older version of the
application. After the new version of the application is deployed
to the blue group, repeat the process with the green group. In this
way, you can deploy a new version of software while still providing
uninterrupted service in your production environment.