Update voice-and-video-insights.md

Author: amagginetti

articles/communication-services/concepts/analytics/insights/voice-and-video-insights.md

@@ -135,6 +135,12 @@ And can also be filtered by endpoint types (**Endpoint Type** parameter), for ex
 
 <!-- :::image type="content" source="..\media\workbooks\voice-and-video-params-2.png" alt-text="Screenshot voice and video quality endpoint type parameter."::: -->
 
+## Performance
+
+The Performance tab provides a summary of decile-level performance for key Calling SDK APIs, helping you identify areas with the highest latency. By default, the dashboard displays a P95 latency trend, offering a high-level view of latency over time.
+
+To explore further, you can select a specific API scenario. When a scenario is selected, the dashboard updates to show a detailed breakdown of that API’s performance, enabling deeper analysis and troubleshooting.
+
 ## More information about workbooks
 
 For an in-depth description of workbooks, refer to the [Azure Monitor Workbooks](/azure/azure-monitor/visualize/workbooks-overview) documentation.