Core Web Vitals Checklist: 12 Fixes That Actually Speed Up Your Website

Google’s Core Web Vitals measure real-user experience: how fast content appears, how responsive the page feels, and how stable the layout is. Slow sites lose rankings, ad efficiency, and conversions.

Use this checklist before you blame “SEO content” alone.

The three metrics (simple version)

• LCP (Largest Contentful Paint) — Main content visible quickly (aim: good < 2.5s).
• INP (Interaction to Next Paint) — Clicks and taps feel snappy.
• CLS (Cumulative Layout Shift) — No annoying jumps while loading.

12 fixes that move the needle

1. Compress and resize hero images

Your LCP element is often a large image. Serve modern formats (WebP/AVIF), correct dimensions, and lazy-load below-the-fold images only.

2. Prioritize above-the-fold images

Mark hero images with priority loading so the browser fetches them first.

3. Limit custom web fonts

Each font weight adds requests. Subset fonts, use font-display: swap, and stick to 1–2 families.

4. Reduce JavaScript on marketing pages

Carousels, chat widgets, and tag managers add weight. Load non-critical scripts after interaction or on scroll.

5. Use a modern framework and hosting

Static generation and edge caching (e.g. Next.js on Vercel) cut TTFB globally compared to overloaded shared hosting.

6. Fix layout shift (CLS)

Always set width/height on images and embeds. Reserve space for ads, banners, and cookie bars.

7. Audit third-party scripts

Heatmaps, chat, and A/B tools are common culprits. Remove what you do not use weekly.

8. Enable caching and CDN

Cache HTML where appropriate, cache assets aggressively, and serve from regions near your users.

9. Streamline CSS

Remove unused CSS from legacy themes. Utility-first builds often ship less dead weight.

10. Improve server response time

Slow APIs and database queries on dynamic pages hurt everything. Cache CMS/API responses when possible.

11. Mobile-first testing

Most traffic is mobile. Test on real devices and throttled networks—not only desktop Lighthouse.

12. Measure after each deploy

Track vitals in Search Console and Real User Monitoring. One big image regression can wipe out weeks of copywriting gains.

Quick win priority

If you only have a week:

1. Hero image + fonts
2. Remove unused scripts
3. Fix CLS on header and images

When to get help

If scores stay poor after basics, you may need architecture changes (stack, CMS, how pages are built)—not another plugin.

Veditr audits and rebuilds slow sites for speed, SEO, and conversion-focused UX.

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