Google uses page experience as a ranking signal. Master these metrics to boost both rankings and user satisfaction.
What Are Core Web Vitals?
Core Web Vitals are Google's set of standardized metrics that measure real-world user experience for loading performance, interactivity, and visual stability. They include:
- LCP (Largest Contentful Paint) – Measures loading performance. Should occur within 2.5 seconds.
- FID (First Input Delay) – Measures interactivity. Should be less than 100 milliseconds.
- CLS (Cumulative Layout Shift) – Measures visual stability. Should be less than 0.1.
Why They Matter for SEO
Core Web Vitals are confirmed ranking factors. Sites that excel in these metrics tend to rank higher in search results. But it's not just about rankings—it's about conversion. A 1-second delay in mobile page load times can impact conversions by up to 20%.
How to Improve Each Metric
For LCP: Optimize images, use a CDN, enable compression, and prioritize critical resources.
For FID: Reduce JavaScript execution time, break up long tasks, and use web workers for heavy processing.
For CLS: Always include size attributes on images and videos, avoid injecting content above existing content, and use transform animations instead of animations that trigger layout changes.
Key Takeaway
Core Web Vitals aren't just technical metrics—they're measures of whether your website delivers a good user experience. Invest in optimizing them, and you'll see improvements in both search rankings and business outcomes.