What the three numbers mean, why they affect sign-ups, and the fixes that make the biggest difference.
Core Web Vitals are three measurements of how fast and stable your site feels. Search engines use them, and so do your visitors — slow pages lose sign-ups.
The three numbers
- Largest Contentful Paint: how quickly the main content appears
- Interaction to Next Paint: how fast the page reacts to taps and clicks
- Cumulative Layout Shift: how much things jump around while loading
The fixes that matter most
Right-sized images, fewer third-party scripts and reserved space for anything that loads late fix most sites. On one SaaS rebuild, that took load time from over two seconds to under one.