概要
This skill assists developers in integrating Real User Monitoring (RUM) into web applications to gain visibility into the actual performance experienced by end-users. It guides the selection of RUM platforms like Datadog, New Relic, or Google Analytics, defines essential instrumentation strategies for metrics like Core Web Vitals (LCP, FID, CLS), and assists in writing the JavaScript tracking code necessary to monitor page load times and custom user journey events. It is particularly useful for teams looking to move beyond synthetic testing to data-driven performance optimization based on real-world conditions.