Which two are valid descriptions of how storage drs is used in a vsphere implementation?

Even seasoned pros usually got the notion that storage drs reclaims overprovisioned capacity to increase resource utilization in a vsphere implementation. But that is not so because the popular descriptions of storage drs' function in a vsphere implementation are: (1) storage drs keeps workloads on storage devices more evenly balanced and (2) storage drs monitors the storage habits of virtual machines.