What is VDA Single Subscriptions VL OLV?

Question

System administration

Can someone explain what VDA Single Subscriptions VL OLV NL 1Month Additional Product Per Device is ? Why is she needed? Under what conditions should it be purchased?
UPD:
Solution in the comments to the answer.

Answer 1

VDI access licenses for thin clients (thin clients that are not covered by Software Assurance) and computers that do not belong to the organization. Acquire, if necessary, connect these virtual slaves to the farm. tables.