Core Web Vitals
Track and improve your website's Core Web Vitals performance metrics using data from Google PageSpeed Insights.
What It Is
Core Web Vitals are Google's user experience metrics that impact search rankings:
| Metric | Full Name | What It Measures | Good Threshold |
|---|---|---|---|
| LCP | Largest Contentful Paint | Loading performance | < 2.5 seconds |
| INP | Interaction to Next Paint | Interactivity | < 200ms |
| CLS | Cumulative Layout Shift | Visual stability | < 0.1 |
How It Works
SEOGEO Tools uses the Google PageSpeed Insights API to:
- Test your pages against real-world data
- Track metrics over time
- Identify performance issues
- Provide optimization recommendations
- Go to Settings > API Keys
- Enter your PageSpeed API key
- Click Validate & Save
- Go to Google Cloud Console
- Create or select a project
- Enable the PageSpeed Insights API
- Create an API key
- Copy and paste into SEOGEO Tools
- Overall CWV pass rate across your site
- Breakdown by metric (LCP, INP, CLS)
- Trend charts showing improvement
- Individual metric scores
- Pass/Needs Improvement/Poor status
- Historical data
- Comparison to previous tests
- Images to optimize
- JavaScript to defer
- CSS to inline
- Server response improvements
- All crawled pages queued for CWV testing
- Rate-limited to respect API quotas
- Results stored for trend analysis
- Go to Core Web Vitals
- Enter URL or select from list
- Click Test Now
- View results when complete
- LCP: Under 2.5 seconds
- INP: Under 200 milliseconds
- CLS: Under 0.1
- LCP: 2.5 - 4 seconds
- INP: 200 - 500 milliseconds
- CLS: 0.1 - 0.25
- LCP: Over 4 seconds
- INP: Over 500 milliseconds
- CLS: Over 0.25
- Optimize images (format, size, lazy loading)
- Reduce server response time
- Preload critical resources
- Use a CDN
- Minimize JavaScript execution
- Break up long tasks
- Optimize event handlers
- Reduce DOM size
- Set explicit dimensions for images/embeds
- Reserve space for dynamic content
- Avoid inserting content above existing
- Use CSS transforms for animations
- Go to Settings > Scheduling
- Enable Core Web Vitals schedule
- Choose frequency (weekly recommended)
- Tests run automatically
Setting Up CWV Monitoring
API Key Required
Core Web Vitals monitoring requires a PageSpeed API key:
Getting a PageSpeed API Key
CWV Dashboard
Overview
Page-Level Results
For each tested page:
Opportunities
Performance improvement suggestions:
Testing Pages
Automatic Testing
Pages are tested during audits:
Manual Testing
Test specific pages on demand:
Understanding Results
Good (Green)
Needs Improvement (Yellow)
Poor (Red)
Improving Core Web Vitals
LCP (Loading Speed)
INP (Interactivity)
CLS (Visual Stability)
Scheduling CWV Tests
Set up automatic monitoring: