Core Web Vitals

What Are Core Web Vitals?

Core Web Vitals are Google's standardised metrics for measuring real-world user experience on the web. They focus on three critical aspects of page quality:

LCP — Largest Contentful Paint

Measures loading speed. How quickly the main content becomes visible. Target: under 2.5 seconds.

CLS — Cumulative Layout Shift

Measures visual stability. How much the page layout shifts unexpectedly. Target: under 0.1.

INP — Interaction to Next Paint

Measures responsiveness. How quickly the page responds to user input. Target: under 200ms.

TTFB — Time to First Byte

Measures server speed. How quickly the server begins responding to requests.

Why They Matter

Google has used Core Web Vitals as ranking signals since 2021. Poor scores directly impact your search visibility and user experience:

Google uses these metrics to determine search rankings
Poor scores push your pages lower in search results
53% of users abandon a site if it takes over 3 seconds to load
Slow sites lose conversions, revenue, and user trust

What You Get

SEO Auditor fetches real data from Google's PageSpeed Insights API and presents it in a clear, actionable format:

Performance score (0–100) based on Lighthouse analysis
Accessibility score with specific improvement suggestions
Best practices score covering security and modern web standards
SEO score evaluating technical search engine optimisation
Specific optimisation opportunities with estimated savings

Benefits

See What Google Sees

Know exactly how Google evaluates your site's performance using the same data source.

Prioritise by Impact

Focus on the fixes that will make the biggest difference to your scores and rankings.