The Pi-Hole tile is custom driver to disable DNS Ad Blocking if there's some link someone needs to get to that is being filtered.
Pi-Hole also occasionally sends some stuff to the Hubitat hub about the number of queries blocked etc. It was converted to Hubitat by @cuboy29. https://community.hubitat.com/t/ported-over-pi-hole-on-off-toggle/3165
Pi-Hole is a DNS AD Blocker that runs on a Raspberry PI and this driver controls it. https://pi-hole.net/ It allows you to perform whole-home adblocking without needing to install anything on any of the devices in your house.
I hope this answers your question.
