Domain generation algorithms (DGAs) are used to auto-generate domains, typically in large numbers within the context of establishing a malicious command-and-control (C2) communications channel. DGA-based malware (such as Pushdo, BankPatch, and CryptoLocker) limit the number of domains from being blocked by hiding the location of their active C2 servers within a large number of possible suspects, and can be algorithmically generated based on factors such as time of day, cryptographic keys, or other unique values.
https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-admin/threat-prevention/dns-security/domain-generation-al

Explanation
First - Block List
Second - Allow List
Third - Custom URL Categories
Fourth - External Dynamic Lists
Fifth - Downloaded PAN-DB Files
Sixth - PAN-DB Cloud

https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-admin/policy/security-policy/security-policy-actions.html

Best Practice Assessment (BPA) Tool -The BPA for next-generation firewalls and Panorama evaluates a device's configuration by measuring the adoption of capabilities, validating whether the policies adhere to best practices, and providing recommendations and instructions for how to remediate failed best practice checks.
The Security Policy Adoption Heatmap component filters the information by device groups, serial numbers, zones, areas of architecture, and other categories. The results include trending data, which shows the rate of security improvement as you adopt new capabilities, fix gaps, and progress toward a Zero-Trust network.
The BPA component performs more than 200 security checks on a firewall or Panorama configuration and provides a pass/fail score for each check. Each check is a best practice identified by Palo Alto Networks security experts. If a check returns a failing score, the tool provides the justification for the failing score and how to fix the issue.
https://docs.paloaltonetworks.com/best-practices/8-1/data-center-best-practices/data-center-best- practice-security-policy/use-palo-alto-networks-assessment-and-review-tools