Modern web applications have increased in complexity, necessitating robust monitoring strategies to ensure high-quality user experiences and operational reliability. Key strategies for monitoring the health of web applications include uptime and availability checks, performance metrics, critical transaction monitoring, error tracking, and security testing. These strategies utilize a variety of tools to provide insights into application health, detect unforeseen issues, and facilitate rapid troubleshooting. Ensuring uptime is essential to prevent customer dissatisfaction and revenue loss, while performance monitoring helps maintain a seamless user interface by identifying and resolving performance bottlenecks. Monitoring critical transactions ensures that essential user interactions remain functional, while error monitoring tools help developers address and fix bugs promptly. Security testing, often outsourced to professionals, safeguards against vulnerabilities like XSS and SQL Injection. Collectively, these strategies and tools enable developers to maintain reliable, secure, and efficient web applications.