Definition
Core Web Vitals are Google’s page experience metrics: LCP (loading), INP (interactivity), and CLS (visual stability).
Detailed Explanation
| Metric | Measures | Good threshold |
|---|---|---|
| LCP | Largest Contentful Paint | ≤ 2.5s |
| INP | Interaction to Next Paint | ≤ 200ms |
| CLS | Cumulative Layout Shift | ≤ 0.1 |
Reported in GSC and PageSpeed Insights. Field data (CrUX) matters more than lab scores for ranking signals.
Nepal Context
Shared hosting and unoptimized hero images hurt LCP on mobile networks. Compress WebP images, lazy-load below fold, use local CDN if serving Nepal-heavy traffic.
Key Takeaways
- Mobile field data drives the ranking signal
- Fix LCP first — usually images or server response time
- INP replaced FID as the interactivity metric in 2024
Common Mistakes
- Chasing lab scores only, ignoring CrUX field data
- Huge unoptimized hero images on mobile
- Layout shift from late-loading ads or fonts (CLS)
