A keygen, short for key generator, is a software tool used to generate a valid license key for a software application. In the case of Elby CloneDVD 2.9.3.3, a keygen can be used to bypass the software's licensing restrictions, allowing users to access the software's full features without purchasing a license.
If you are looking for the actual capabilities of the software itself (CloneDVD 2), here is what the legitimate version offers: elby CloneDVD 2.9.3.3 Keygen -x86x64- -CrackingPatching-