Once you have some telemetry data collected you can start analyze the telemetry data by select different set of properties.
The trends windows also categorized the analyzed result for better visualization and you can select the based on different set of values – for an example, successful or failed requests type.
This tool can also be used to find anomalies in your data. Select the anomaly options from the “View Type” dropdown.
You can also choose “Application Insights Trends” window from View –> Other Windows.