Core Web Vitals Guide for Marketing Websites
Core Web Vitals, LCP, INP, and CLS, measure real-world loading, responsiveness, and visual stability, and they're a confirmed Google ranking signal.
Marketing websites tend to fail these for the same handful of preventable reasons.
Key Points
Unoptimized hero images
The single most common LCP killer on marketing sites, oversized images with no responsive sizing.
Render-blocking scripts
Third-party marketing tags loaded synchronously instead of deferred.
Layout shift from late-loading content
Ads, embeds, and fonts that load in and push content around after first paint.
Field data over lab data
Real user metrics (CrUX) matter more than a single Lighthouse run.
Want This Applied to Your Site?
This is the general framework. Applying it to a specific website means real audit work, not a template.