The Page Speed feature helps users analyze how fast their website pages load and identifies performance issues that can affect user experience, SEO rankings, conversions, and Core Web Vitals.
Page Speed uses Lighthouse-style performance analysis to evaluate every URL and provides actionable recommendations for improving website speed and overall page experience. Google considers page experience and Core Web Vitals as important quality signals, making speed optimization an essential part of SEO.
1. Page Speed Dashboard
The Page Speed dashboard serves as the entry point for analyzing website performance.
Purpose
Allows users to select a connected website property and run performance audits across all URLs.
Features
- Displays all connected website properties.
- Supports URL Prefix properties.
- One-click access to performance analysis.
- Centralized speed monitoring for multiple projects.
User Action
1. Open Page Speed from the Analyze section.
2. Select a website property
3. Start the analysis process
2. URL Performance Overview
After selecting a property, users can see a complete summary of website performance.
Metrics Displayed
Analyzed URLs
Shows the total number of URLs successfully audited.
Example:
27 / 27 URLs analyzed
Average Performance Score
Average Lighthouse Performance Score across all pages.
Score Range
Score
Status
90 – 100
Excellent
50 – 89
Needs Improvement
0 – 49
Poor
Google generally considers scores above 90 as good performance. (RankGap)
Needs Attention
Displays pages with low performance scores requiring optimization.
This helps users quickly identify problem pages without reviewing every URL manually.
CWV Passing
Shows how many pages successfully pass Core Web Vitals requirements.
Core Web Vitals include:
- Largest Contentful Paint (LCP)
- Interaction Responsiveness
- Cumulative Layout Shift (CLS)
These metrics are used by Google to evaluate page experience. (Core Web Vitals Analyzer)
3. Mobile & Desktop Analysis
Users can switch between:
Mobile
Analyzes performance on mobile devices
Desktop
Analyzes performance on desktop devices.
Since Google primarily evaluates user experience on mobile devices, mobile scores are often lower and require more optimization. (Glasp)
4. Analyze All URLs
Purpose
Runs a fresh performance audit across every page in the selected website.
Benefits
- Updates performance scores.
- Detects new speed issues.
- Monitors optimization progress over time.
5. URL Performance List
Displays every analyzed page
For each URL, users can view:
Performance Score
Overall page speed score
Accessibility Score
Measures accessibility compliance
Examples:
- Color contrast
- Alt text usage
- Screen reader compatibility
Best Practices Score
Measures technical quality and modern web standards.
Examples:
- HTTPS usage
- Secure coding practices
- Browser compatibility
SEO Score
Measures basic SEO implementation
Examples:
- Meta tags
- Crawlability
- Structured page elements
Status Indicator
Pages are categorized as:
- Good
- Needs Improvement
- Needs Work
This allows users to prioritize optimization efforts.
6. URL Detail Report
Clicking any URL opens a detailed performance report.
The report provides a complete breakdown of page performance metrics.
Performance Score
The main Lighthouse performance score
Example:
53 / 100
Status:
Room for Improvement
This indicates users may experience slower loading times or interaction delays.
7. Performance Categories
Each page receives four major scores:
Performance
Measures loading speed and responsiveness.
Accessibility
Measures usability for all users
Best Practices
Measures technical implementation quality.
SEO
Measures search engine optimization readiness.
8. Opportunities Section
Shows actionable improvements that can increase page speed.
Examples
- Compress images
- Reduce unused JavaScript
- Optimize CSS
- Enable caching
- Minify code
- Reduce server response time
These opportunities represent the highest-impact optimizations available for the page. (supermonitoring.com)
9. Core Web Vitals
Core Web Vitals are Google's user experience metrics.
Metrics
Largest Contentful Paint (LCP)
Measures how quickly the main content loads.
Good: Under 2.5 seconds
Interaction Responsiveness
Measures how quickly users can interact with the page.
Cumulative Layout Shift (CLS)
Measures visual stability
Example:
- Buttons moving while loading
- Images causing layout jumps
Pages passing these metrics generally provide a better user experience. (Core Web Vitals Analyzer)
10. Poor Metrics Section
Displays metrics that exceed Google's recommended thresholds.
Purpose
Helps users identify:
- Slow loading elements
- Heavy scripts
- Render-blocking resources
- User experience issues
The lower this number, the better
11. Diagnostics Section
Technical findings discovered during analysis.
Examples
- Large JavaScript bundles
- Excessive DOM size
- Slow server responses
- Unused CSS
- Third-party script impact
- Long main-thread tasks
Diagnostics help developers understand the root cause of performance issues.
12. Core Web Vitals & Lab Metrics
Provides detailed performance measurements collected during testing.
Common Metrics
First Contentful Paint (FCP)
When the first visible content appears
Largest Contentful Paint (LCP)
When the main content becomes visible
Speed Index
How quickly page content becomes visually available.
Total Blocking Time (TBT)
Measures how long the browser is blocked by scripts.
Cumulative Layout Shift (CLS)
Measures visual stability.
These metrics are commonly used by Lighthouse and PageSpeed tools to evaluate website performance. (PageSpeed Insights)
13. AI Performance Advisor
Purpose
Provides AI-generated recommendations for improving page speed.
Features
- Analyzes Lighthouse data
- Reviews Core Web Vitals
- Identifies optimization opportunities
- Generates prioritized fixes
- Provides implementation suggestions
- Helps developers resolve issues faster