Synthetic monitoring uses scripted tests to simulate user interactions, helping detect and resolve issues proactively. This guide explores how to leverage command-line tools for synthetic monitoring, focusing on identifying, analyzing, and customizing error handling to enhance app performance. By setting up command-line-based tests, developers can streamline performance checks, gain insights into potential issues, and ensure a smoother user experience. Perfect for development teams aiming for continuous performance improvements, this approach allows for real-time insights and quicker resolutions, boosting both application reliability and user satisfaction.