Final answer:
Using the Mass Back Promote & Deploy button in Copado creates one Promotion record for all selected user stories, streamlining the promotion process.
Step-by-step explanation:
When you use the Mass Back Promote & Deploy button in Copado to handle user stories, Copado creates one Promotion record for all the selected user stories. This is because the intention of the mass back-promotion feature is to streamline the process by consolidating multiple user stories into a single promotion for efficiency and ease of tracking. This contrasts with performing individual back-promotions for each user story, which would result in a separate promotion record for each one.