Fast sites convert better. To improve Core Web Vitals in 2025, focus on a few high‑impact fixes: modern images, smart font loading, trimmed JavaScript, and a clean render path.
Quick wins
Serve images in WebP/AVIF and set width/height to prevent layout shifts. Preload key fonts and use font‑display: swap. Inline critical CSS and defer the rest. Remove unused scripts and third‑party tags.
Vitals targeting
LCP: optimize the hero image, reduce server TTFB, and simplify above‑the‑fold rendering. CLS: reserve space for images/ads and avoid late‑loading UI changes. INP: break up long tasks, hydrate only on interaction, and move work to Web Workers.
Tools
Use Lighthouse and PageSpeed Insights for field and lab data, WebPageTest for filmstrips and waterfalls, and Chrome Performance to hunt long tasks.