Largest Contentful Paint and Cumulative Layout Shift are practical signals: users want important content to appear quickly and pages to stay visually stable.
Start with these checks
- Identify the LCP element on your most important pages.
- Compress and prioritise hero media.
- Reserve space for images, embeds and banners.
- Reduce render-blocking CSS and slow third-party scripts.
- Use field data where available before celebrating lab-only scores.