Understanding Core Web Vitals
Core Web Vitals are Google's metrics for measuring real-world user experience:
- LCP (Largest Contentful Paint): Loading speed — target under 2.5s
- INP (Interaction to Next Paint): Interactivity — target under 200ms
- CLS (Cumulative Layout Shift): Visual stability — target under 0.1
LCP Optimization
Optimize images (WebP, lazy load), preload critical resources, use a CDN, reduce server response time.
INP Optimization
Minimize JavaScript, break up long tasks, use web workers for heavy computation.
CLS Optimization
Set explicit dimensions on images/videos, avoid dynamically injected content above the fold, use font-display:swap.
Test your vitals with SEOBOTX.