Release
A version of a service or other configuration item, or a collection of configuration items, that is made available for use.
Impact
The Release is the moment value is realized by the user.
Weinto take
Decouple Release from Deployment. Deployment is technical (putting bits on a server). Release is commercial (flipping a feature flag to show the user). We deploy continuously; we release selectively. This gives marketing and product teams control over the "Big Reveal" without blocking the engineering team.