← Back to blog
Website Advice · 8 July 2026 · 6 min read
Core Web Vitals That Actually Convert
Speed scores are vanity until they move revenue. What we optimise first, and why.
A perfect Lighthouse score on a page nobody converts on is an expensive trophy. We optimise in revenue order: LCP on money pages, then interaction latency in forms.
Largest Contentful Paint is usually a hero image problem. Correct dimensions, modern formats and edge delivery solve most of it in an afternoon.
Interaction to Next Paint punishes heavy client-side work. Ship less JavaScript, defer what isn't visible, and keep forms server-validated but instantly responsive.
Cumulative Layout Shift kills trust more than it kills rankings. Reserve space for every asynchronous element.