Merge pull request #233145 from vhorne/fw-logs-metrics

add info for AZFW Latency Probe (Preview)

Author: prmerger-automator[bot]

articles/firewall/logs-and-metrics.md

@@ -193,10 +193,12 @@ The following metrics are available for Azure Firewall:
 
    - Monitor and alert if there are any latency or performance issues, so IT teams can proactively engage.  
 
-   There may be various reasons that can cause high latency in Azure Firewall. 
+   - There may be various reasons that can cause high latency in Azure Firewall. For example, high CPU utilization, high throughput, or a possible networking issue.
 
-   This metric does not measure end-to-end latency of a given network path. In other words, this latency health probe does not measure how much latency Azure Firewall adds. 
+     This metric does not measure end-to-end latency of a given network path. In other words, this latency health probe does not measure how much latency Azure Firewall adds.
 
+   - When the latency metric is functioning as expected, a value of 0 appears in the metrics dashboard.
+   - As a reference, the average expected latency for a firewall is approximately 1 m/s. This may vary depending on deployment size and environment.   
 
 ## Next steps