Largest Contentful Paint (LCP)
LCP measures perceived loading speed, tracking when the main content of a page is rendered (ideally within 2.5 seconds). To improve LCP, optimize your critical rendering path, compress hero images, and reduce TTFB.
Cumulative Layout Shift (CLS)
CLS measures visual stability, tracking unexpected layout shifts during load (target below 0.1). Prevent shifts by reserving width and height dimensions on images, ads, and iframes.
Interaction to Next Paint (INP)
INP replaced FID in 2024 to measure user responsiveness, tracking the delay between a user click or keypress and the next paint frame (target below 200ms). Focus on minimizing long-running JavaScript execution.