Web developers often overlook the complexity involved in loading assets like images, scripts, and stylesheets, which significantly affects user experience. A real-world example highlights an ecommerce platform where inconsistent loading of product images led to customer complaints, revealing the importance of visibility into resource performance. The PerformanceResourceTiming API provides detailed metrics on how resources load, enabling developers to identify and address performance issues. By integrating this API with tools like New Relic, developers can aggregate data across all users and pages to uncover hidden issues, such as redirection delays or network latency. This can lead to actionable insights, enabling improvements in resource optimization, user satisfaction, and business outcomes. Through proactive monitoring and optimization, developers can ensure their applications deliver optimal user experiences across all regions.