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Application Insights plays a crucial role in Azure DevOps by providing deep insights into application performance and behaviors. This tool is essential for monitoring how applications perform in real-time, allowing development teams to identify and diagnose various issues such as slow response times, application failures, and user experience problems.

By collecting telemetry data, Application Insights helps teams understand the health of their applications and how users interact with them. This data can include performance metrics, exception tracking, and user engagement statistics, which are vital for making informed design and development decisions. With its ability to alert teams to performance bottlenecks and other critical issues promptly, Application Insights ensures that developers can maintain high-quality applications and deliver a better user experience.

This focus on continuous monitoring and diagnostics aligns perfectly with the DevOps practice of maintaining a robust feedback loop within the development lifecycle, enabling teams to iterate quickly and implement changes effectively based on real-world usage and performance data.