Core Web Vitals: Google's UX Ranking Signals

Michael Rodriguez

Technical SEO Lead

Published: July 10, 2025 at 10:12 AM•Updated: December 2, 2025 at 2:21 PM•1 min read•664 views

What Are Core Web Vitals?

Core Web Vitals are specific factors Google considers important for user experience.

The Three Metrics

Largest Contentful Paint (LCP): Measures loading performance. Should occur within 2.5 seconds.

First Input Delay (FID): Measures interactivity. Should be under 100 milliseconds.

Cumulative Layout Shift (CLS): Measures visual stability. Should be under 0.1.

How to Improve Core Web Vitals

LCP Optimization

Optimize server response time
Use faster hosting
Compress images
Implement caching

FID Optimization

Minimize JavaScript
Break up long tasks
Use web workers

CLS Optimization

Set size attributes on images/videos
Reserve space for ads
Avoid inserting content dynamically

Monitor Core Web Vitals in Google Search Console and PageSpeed Insights regularly.

Sources & References

This article was reviewed by our editorial team. See our editorial guidelines for more information about our content standards.

Michael RodriguezTechnical SEO Lead

Michael Rodriguez is a technical SEO expert and web developer with 8 years of experience in optimizing website performance and search visibility. With a background in computer science and a passion for search algorithms, Michael bridges the gap between development and SEO. He has conducted over 500 technical SEO audits and specializes in Core Web Vitals optimization, JavaScript SEO, and site architecture. Michael regularly contributes to industry publications and maintains an active presence in the SEO community.

Credentials & Certifications:

Computer Science Degree
Google Web Fundamentals Certified
Screaming Frog Certified
500+ Technical SEO Audits Completed

Technical SEOCore Web VitalsJavaScript SEOSite Architecture

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