We are here to teach you what you need to know

The DNS CONFIGURATION changes can also be made on the router. Making this change at the router level will allow all devices on the network to take advantage of the change. This also means that you do not have to make the change to every connected devices.

Also, the AdGuard DNSs as noted in the guide, will block adds, and tracking on all connected devices when configured properly.

That means that even those annoying browser adds on your network attached computer will be blocked.

To learn how to change the DNS settings on your router, We suggest that you GOOGLE it. All routers are different.

Just food for thought.