Web Performance Skill

Slow websites lose users. Google uses Core Web Vitals for search ranking. This skill covers measuring, diagnosing, and fixing web performance — from server response time to the last pixel painted.

When to Activate

• Core Web Vitals are failing in Search Console or Lighthouse
• Bundle size has grown and pages feel slow
• Setting up Lighthouse CI to prevent regressions
• Diagnosing why a page's LCP or INP is poor
• Before a major release that changes the critical rendering path

Core Web Vitals

The three metrics Google uses for search ranking and UX quality:

LCP — Largest Contentful Paint