Error monitoring is crucial for web development as it helps improve customer experience, reduce revenue loss, increase developer productivity, and enhance engineer morale. By proactively identifying and addressing errors, organizations can prevent unhappy customers, deterred sales, and diminished revenues, while also maintaining high app performance and reliability. An efficient error monitoring solution provides visibility into the most impactful errors, enabling teams to prioritize and allocate resources effectively, thus reducing Mean Time to Detect (MTTD) and Mean Time to Restore (MTTR). Furthermore, it supports continuous integration and delivery practices, allowing developers to deploy with confidence, reduce technical debt, and focus on building new features. By minimizing the burden of error-related firefighting, error monitoring can help retain and attract top engineering talent, creating a more efficient and satisfied workforce.