Azure Application Insights provides a powerful tool to monitor the performance and behavior of your application. Follow these steps for a better user experience and performance.

Step 1: Create an Azure Application Insights Resource

1. Sign in to the Azure portal (https://portal.azure.com).
2. Click “Create a Resource” from the left-hand side menu.
3. Choose “Monitoring”, followed by “Application insight.”
4. Fill in resource details including name, group, subscription and application (e.g. web app, backend api).
5. Click “Review+Create”, verify the configurations then click “Create.”

Step 2: Instrumentation

1. Install the SDK for Application Insights in your application. NuGet is a good option for.NET application development.TextInstall-Package Microsoft.ApplicationInsights.AspNetCore Maven can be used for Java applications:xml  com.microsoft.azure applicationinsights-core 2.6.1
2. Configure SDK by adding Instrumentation Key to your application settings. (found on the Azure portal, under your Application Insights Resource).

Step 3: Track Metrics

1. Use the built-in Telemetry to track requests, dependency and exceptions. In your code, you can initialize Application Insights.
2. Add custom telemetry tracker using TelemetryClient :csharp var telemetryClient = new TelemetryClient(); telemetryClient.TrackEvent("CustomEvent");

Step 4: Analyze Telemetry Results

1. Navigate your Application Insights resources in the Azure portal.
2. Use the “Metrics,” “Logs,” and “Failures” tabs for analysis of performance data, identifying bottlenecks, as well as viewing failure rates.

Step 6: Configure Alerts

1. Go to “Alerts”, a section in your Application Insights.
2. Create alerts that are based on performance metrics such a response time, failures rates, or pages viewed to be notified of any issues.