Assumptions

Setup

In a web browser goto the Web UI of the Pi-Hole installation
Select the Login item on the left hand side and enter the Web UI password
This is the normal Pi-Hole Dashboard
Manage the ad lists by first selecting group management on the left and then AdLists in the expanded list. Then fill in a Cyberblock DB domain list URL as desired in the Address field.
NOTE: The UID shown, HXJ-TUB-REV, is just for example purposes and must be replaced by your unique UID.
The link generator tool can be used to easily generate valid ad list links
Shown is a typical Pi-Hole ad lists setup from Cyberblock DB in addition to the default ad list provided PiHole. The default PiHole list changes from time to time and is included in the Cyberblock DB ads list. The default ads list can be deleted by clicking on the trash can icon associated with that row.
Ad list content needs to be updated by clicking the "online" link text.
Click the Update button and follow instructions
This shows a successfully updated PiHole