This is great for getting a Lab environment spun up for testing or training purposes.
Note: Building a new Lab can take a little while, depending on the number of VM’s in the Lab as well as the number of different Operating Systems used.
For most Sample Lab I’d recommend at least a quad core CPU, 16 GB RAM and a fast SSD with at least 10 GB per VM free (although for Nano Server VMs only 800MB is required).
The amount of disk used is minimized by using Most Labs use DSC to configure each VM once it has been provisioned, so the ability to download any required DSC Resources from the Power Shell Gallery is required.
What this essentially does is allow you to easily build Lab environments using a specification file.