Just as Applications package together components. Releases package together Applications. This packaging enables you to release multiple applications together out to an environment. Applications dependencies are at a higher level than component to component dependencies. These dependencies are usually driven by changes in data structures, communication layers or by reusable components.
Everyone get up and move over…
Lets say that you have a reusable logging routine that has changed (backward compatibility broken) and multiple applications consume the reusable logging routine from a shared area. Each application should be re-released using the new logging routine. Release packaging in Release Engineer enables you to create a release with all of the applications that use the reusable logging component and then deploy the whole release to an environment, instead of deploying each application individually. Also, the release packaging shows at a quick glance which applications are going to be deployed. Everything is transparent so applications are not missed.