For Adguard DNS: dns.adguard.com
For Adguard DNS and removing adult content: dns-family.adguard.com
STEP 2- You will also need to clear the prebuilt DNS cache.
1. You won't be able to view most of the video ads in apps and games, so if you want to get free coins for watching the video ads in some app/game, you'll probably have to turn off the private DNS.
2. I have trouble connecting to public wifi hotspots. When you connect to such hotspot, it should open an authorization page, where you need to enter the phone number and wait for an SMS with the code to connect (at least in my country so). Adguard blocks access to these pages and I have to disable it so they load up.
3. Some web-sites are not working properly (don't load, don't fully load or load crooked and so on) . I have met problems very rarely, but still met.