Manage Versions in Tag Manager
Versions let you save a copy of a container's current configuration so you can roll back to a previous version if necessary.
You have the option of not publishing it yet, which will give other users the opportunity to see the changes you have made and provide their feedback. It also makes error recovery easier and allows you to easily find all previously deployed tags, triggers, and variables. When you are satisfied With your current configuration, you can publish it to a specific environment (Dev, Staging, Live).
For example, you might want to deploy your tag first to a “test” (Dev) or “staging” (Staging) environment to ensure that the configuration current system works before making it available to everyone using the live environment (Live).
You can also import/export containers from the release menu.