In the how this works section they detail that it comes from MDM solutions. In English this is a feature for it admins of companies who use the intune management software from Microsoft. You probably need pro or better to even use the feature.
At a quick glance, it looks to be a way of whitelisting domains at a DNS level, but with the added feature of having allowed DNS servers.
I don’t know about other places but they haven’t had a counter for years round here. They have big screens that you go up to to order and pay, then you get a number and pick it up when called. Even if you wanted to do this, no one is going to listen to you trying to order at the kitchen.