Adding to Maik's response: The concepts of Release Management are stated here https://docs.servicenow.com/bundle/rome-it-service-management/page/product/release-management/concep....
Scoping a release
Before starting the release execution, you must define scope of the release. Scope of a release includes the work artifacts such as projects, epics, stories, enhancements, and defects that are a part of the release.
For example, a minor release might only have a few problems and enhancements whereas a major release might have multiple projects or epics associated to it.
