The definition is:
|Detects New and Unknown Malicious Web-Based Attacks in real-time. This is a feature of Advanced URL Filtering.|
Here is a link to the white paper describing it.
Recommendation is to block Real Time Detection and Encrypted DNS
Blocking Encrypted DNS stops DNS over HTTPS, forcing your clients to revert to regular DNS that the Palo Alto can see.
Please see blog on Encrypted DNS below for more info:
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