Core Web Vitals
Core web vitals are Google's measurements of the experience real visitors get on your site. Strong scores help with search rankings and reduce the chance that visitors leave before your page finishes loading.
What you see
The card has three rows, one per metric, with separate values for Desktop and Mobile. Color coding tells you at a glance how each metric is doing.
| Metric | What it measures | Good |
|---|---|---|
| LCP — Largest Contentful Paint | How quickly your main content appears on screen | Under 2.5 seconds |
| TBT — Total Blocking Time | How long the page is unresponsive to clicks while loading | Under 200 ms |
| CLS — Cumulative Layout Shift | How much elements jump around as the page loads | Under 0.1 |
When a score is poor
- Slow LCP — Compress hero images, enable the CDN, or upgrade to a faster PHP version.
- High TBT — Remove or defer heavy third-party scripts (chat widgets, marketing tags).
- High CLS — Set explicit width and height on images, reserve space for ads and embeds.
For specific, prioritized fixes, open Performance improvement opportunities from the Performance card.
tip
Core Web Vitals are part of Google's search ranking signals. Improving them often improves both search visibility and conversion.