Core Web Vitals in 2025: What You Need to Know

What are Core Web Vitals?

Core Web Vitals are a set of specific factors that Google considers important in a webpage's overall user experience. They measure real-world user experience for loading performance, interactivity, and visual stability.

The Three Core Web Vitals

1. Largest Contentful Paint (LCP)

LCP measures loading performance. To provide a good user experience, LCP should occur within 2.5 seconds of when the page first starts loading.

2. Interaction to Next Paint (INP)

INP replaced First Input Delay (FID) in 2024. It measures responsiveness by observing the latency of all interactions throughout the page lifecycle. A good INP score is 200 milliseconds or less.

3. Cumulative Layout Shift (CLS)

CLS measures visual stability. Pages should maintain a CLS of 0.1 or less to ensure users don't experience unexpected layout shifts.

Why Core Web Vitals Matter for SEO

Google uses Core Web Vitals as ranking signals. Sites that perform well on these metrics have a better chance of ranking higher in search results, especially when competing content is similar in quality and relevance.

How to Measure Your Core Web Vitals

**Google PageSpeed Insights** - Quick analysis of any URL

**Google Search Console** - Track your site's performance over time

**SiteRoast.ai** - Get detailed insights from our Performance Agent

Quick Tips to Improve Core Web Vitals

**For LCP**: Optimize images, use a CDN, implement lazy loading

**For INP**: Minimize JavaScript, break up long tasks, optimize event handlers

**For CLS**: Set explicit dimensions for images and embeds, avoid inserting content above existing content

Conclusion

Core Web Vitals are essential for both user experience and SEO. Regular monitoring and optimization of these metrics should be part of your website maintenance routine.

Use SiteRoast.ai to automatically analyze your Core Web Vitals and get actionable recommendations to improve your scores.