What is Web Performance Optimization?
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What is Web Performance?
Web performance optimization makes websites load and respond faster. Faster sites mean better UX, higher conversions, and better SEO rankings.
Why Speed Matters
- 53% of users leave if a page takes over 3 seconds.
- Google ranks faster sites higher.
- Speed directly impacts revenue.
Key Areas to Optimize
| Area | Technique |
|---|---|
| Images | Compress, lazy-load, WebP |
| JS/CSS | Minify, code-split |
| Network | CDN, caching, HTTP/2 |
| Fonts | Preload, subset |
Measuring Performance
Use Google Lighthouse (in Chrome DevTools) and WebPageTest to measure and find bottlenecks.
FAQs
What are Core Web Vitals?
Google's key metrics: LCP (load), INP (interactivity), CLS (visual stability). More in our Performance guides.
Biggest quick win?
Optimizing images — usually the largest assets on a page.