Definition
Core Web Vitals are a set of user experience metrics defined by Google to evaluate how well a webpage performs in terms of loading speed, interactivity, and visual stability. They are part of Google’s overall Page Experience ranking signals.
The Three Core Web Vitals
- Largest Contentful Paint (LCP): Measures how quickly the main content of a page loads.
- First Input Delay (FID) / Interaction to Next Paint (INP): Captures how responsive a page is when a user first interacts.
- Cumulative Layout Shift (CLS): Tracks how stable the page is while loading (no jumping buttons or shifting text).
Why It Matters
Core Web Vitals directly impact both search rankings and user satisfaction. Slow or unstable pages frustrate users, increase bounce rates, and reduce conversions. Optimizing for these metrics not only helps with SEO but also ensures visitors stick around and take meaningful actions.
✅ Best Practices for Core Web Vitals
- Improve LCP: Optimize images, use efficient hosting, implement caching/CDNs.
- Reduce INP (formerly FID): Minimize heavy JavaScript and third-party scripts.
- Lower CLS: Set size attributes for images/videos, avoid content shifts from ads or pop-ups.
- Monitor continuously: Use Google Search Console, PageSpeed Insights, or Lighthouse to track performance.
- Combine with CRO: Better UX + faster performance = higher conversion rates.
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