Learn how to build resilient web applications with robust error handling and effective performance monitoring. This guide explores best practices for managing exceptions, preventing crashes, and delivering seamless user experiences. Discover how to implement advanced monitoring tools to track application health, identify bottlenecks, and optimize performance in real-time. From leveraging server-side frameworks like Rails, PHP, or ASP.NET to integrating tools like New Relic or Datadog, this resource provides actionable insights to elevate your development process. Whether you're addressing runtime errors or ensuring peak performance, these strategies will help you create reliable, high-performing web applications that exceed user expectations.