One of the most important things you will need to keep track of as an administrator is the movement of objects throughout the cluster and keeping an eye on recovery/resync activity following failures or maintenance-related outages. This command will show you sync activity due to rebalance tasks, new policy application, and recovery operations.
This information is plumbed into the vSphere Web Client in vSphere 6.0, but it is only available through RVC in vSphere 5.5. This command still works in vSphere 6.0 and can provide additional information about non-VM related objects, which are still not revealed in the vSphere Web Client.