Deploy
Putting new code onto the servers or app stores where real users run it.
What it tells you about a developer
A candidate who has owned deploys understands the highest-stakes moment in the delivery cycle, since a bad deploy takes the product down. Comfort talking through deploy safety, monitoring, and rollback is a reliable marker of production experience.
A deploy takes accepted code and makes it live. Teams deploy anywhere from several times a day to once per release cycle, depending on their automation and their industry. Deploy frequency is one of the best-studied predictors of engineering team performance, through the research known as the DORA metrics.