SAP release is the release of the WAS i.e. 700, 710
or if you mean release management
iRelease Management is used by the software migration team for platform-independent and automated distribution of software and hardware, including license controls across the entire IT infrastructure. Proper software and hardware control ensures the availability of licensed, tested, and version-certified software and hardware, which functions as intended when introduced into existing infrastructure. Quality control during the development and implementation of new hardware and software is also the responsibility of Release
This guarantees that all software meets the demands of the business processes.