I'm starting to get my feet wet with Azure. I've been getting myself familiar with the VM's, networking, etc.
One area where I am confused is when creating a VPN, every Azure article i find has you creating a Gateway Subnet. What is the purpose of creating this when I've already created an address space and then a couple subnets within that address space? I know i must be missing something but it seems to be a waste of IP's and subnets (even if you make it a /27 or /28) when creating a Gateway Subnet.
Is it just for the VPN or something else?