Monitoring application performance on the frontend is crucial in today's fast-paced technology landscape where applications are becoming increasingly complex, and users expect instant results. To address this challenge, Margo Schaedel suggests using tools to track specific performance metrics, which can help diagnose and solve problems as they arise. A Time Series Database can serve as a valuable tool for collecting and storing performance metrics over time, enabling better analysis and decision-making. By adopting such a strategy, developers can ensure their frontend applications remain competitive and meet user expectations.