there are tons of documentation around VVOLS and their benefits, like policy based management, per-vm policies and so on.
As we are in the Veeam forum, I'd like to add that another great advantage of VVOLs is snapshot performance:http://cormachogan.com/2015/03/10/virtu ... snapshots/
Basically, the penalty for running over a snapshot with VVOLs is way lower than regular snapshot, so backup activities are better performing with VVOLs. My personal suggestion would be to stick to VMFS, and if you have enough space, start to play with VVOLs on the storage, move some VMs there, and see how they behave. Veeam supports both vmfs and vvols, and you can even migrate from one to the other or even restore a vmfs vm to a vvol volume, so you are protected during your learning experience with them.