Azure compute vm ({AzureComputeVm}) is using disks which contain more than one snapshot ({AzureComputeVm.Disks.Snapshots}). A snapshot is a full, read-only copy of a virtual hard disk (VHD). You can use a snapshot as a point-in-time backup, or to help troubleshoot virtual machine (VM) issues. Usually, you're only going to need the most recent snapshot to restore data if something goes wrong.