Performance and Web Vitals Run a Lighthouse Audit Or open Chrome DevTools → Lighthouse tab → Analyse page load. Target scores: | Category | Target | |---|---| | Performance | ≥ 90 | | Accessibility | 100 | | Best Practices | ≥ 95 | | SEO | ≥ 95 | --- Core Web Vitals LCP — Largest Contentful Paint How fast does the main content appear? Target: ≤ 2.5s LCP measures when the largest visible element (hero image, heading, video poster) renders. It is the user's perception of "did the page load?" Common causes and fixes: | Cause | Fix | |---|---| | Unoptimised hero image | Use WebP/AVIF, correct siz…