seo-performance
Installation
SKILL.md
seo-performance — Core Web Vitals & Page Performance
Core Web Vitals Thresholds (2026)
| Metric | Good | Needs Improvement | Poor |
|---|---|---|---|
| LCP (Largest Contentful Paint) | ≤2.5s | 2.5s–4.0s | >4.0s |
| INP (Interaction to Next Paint) | ≤200ms | 200ms–500ms | >500ms |
| CLS (Cumulative Layout Shift) | ≤0.1 | 0.1–0.25 | >0.25 |
INP replaced FID on March 12, 2024. FID fully removed September 9, 2024. Never reference FID.
Key Statistics (2026)
- 77% of mobile pages now achieve "good" INP (up from 55% in 2022)
- 57.1% desktop / 49.7% mobile pass all three CWV (Oct 2025)
- December 2025 core update: Mobile CWV weighted more heavily in ranking calculations
- CWV evaluated at 75th percentile of field data — 75% of visits must meet "good"