Tag the Main Branch's Steps
You can create tags on the "Applied" steps of the Main branch as a snapshot at a given point in time.
When you have a set of customizations ready for promotion and merged them with the Main branch, you can tag the Main branch's steps with “Applied” status using the Create Tag option for the Main branch or tag any of it's steps with “Applied” status directly on the Main branch detail page using the Tag option. When you tag a step directly on the Main branch details page or include a step while tagging using the Create Tag option for the Main branch, the steps prior to the selected step are included in the tag too. You can untag the tags that you create for the Main branch's steps using the Untag option.
You later promote the tagged steps of the Main branch to the production environment. See Promote Your Customizations to the Production Environment.