What the measures mean
Largest Contentful Paint describes when the main content becomes visible; Interaction to Next Paint concerns responsiveness; Cumulative Layout Shift tracks unexpected movement. Test real pages, not only the homepage.
- LCP: primary content loading
- INP: response to interaction
- CLS: unexpected movement
Common fixes
Serve appropriately sized images, avoid loading unnecessary scripts, reserve space for media and keep interactive code lean. Field data and lab tests answer different questions; use both carefully.
A fast empty page is not useful. Preserve the content and accessibility people need while improving delivery.
Prioritise by impact
Start with pages that matter to users and the biggest bottleneck. Recheck after changes across mobile devices and connection conditions.
Questions worth asking
Will passing Core Web Vitals put us first on Google?
No. They are one aspect of page experience; relevance, usefulness and other factors also matter.
Advice here is general; the appropriate implementation depends on the people, systems and constraints involved.