What is Google PageSpeed Insights?
Google PageSpeed Insights is an open-source, automated tool for improving the quality of web pages. It audits websites for performance, accessibility, SEO, and best practices.
By running Google PageSpeed Insights regularly and applying its recommendations, you can improve your website’s user experience, speed, and search engine ranking.
Why is Lighthouse important?
- Improves Website Performance: Google PageSpeed Insights measures page speed, load times, and rendering performance, helping to optimize user experience.
- Enhances Accessibility: It checks how accessible your site is for users with disabilities and provides recommendations to improve it.
- Optimizes SEO: It identifies SEO issues that may impact search rankings and suggests improvements.
- Ensures Best Practices: It audits for security, HTTPS usage, and proper coding standards to improve site reliability.
- Supports Progressive Web Apps: It evaluates PWA compliance, ensuring your site can work effectively offline and provide an app-like experience.
How to run a Google PageSpeed Insights Audit
- Visit PageSpeed Insights.
- Enter your website URL and click “Analyze”.
- This runs a audit and provides a performance report for mobile and desktop.
How to Improve Your Scores
- Performance: Optimize image sizes, use WEBP images, use caching, and reduce render-blocking resources.
- Accessibility: Follow WCAG guidelines and ensure keyboard navigation.
- Best Practices: Keep libraries up-to-date and use HTTPS.
- SEO: Optimize for mobile, use proper heading structure, and add meta descriptions.
By running Google PageSpeed Insights regularly and applying its recommendations, you can improve your website’s user experience, speed, and search engine ranking.
Understanding the Lighthouse Report
Google PageSpeed Insights generates a report with a score (0-100) in each category:
1. Performance
Measures site speed, load times, and rendering performance. Key metrics:
- First Contentful Paint (FCP): Time until first content appears.
- Largest Contentful Paint (LCP): Time until the largest visible content loads.
- Cumulative Layout Shift (CLS): Measures visual stability.
- Total Blocking Time (TBT): Delays caused by heavy scripts.
- Speed Index: Overall loading experience.
Improvement Tips:
- Optimize images (use WebP, lazy loading).
- Minify CSS, JavaScript, and HTML.
- Enable caching and use a CDN.
- Reduce third-party scripts.
2. Accessibility
Checks if your site is usable for people with disabilities. Key checks:
- Contrast ratios for readability.
- Proper heading structure.
- Image alt text.
- Keyboard navigation support.
Improvement Tips:
- Use high-contrast text and background.
- Add alt attributes to images.
- Ensure forms and buttons are accessible via keyboard.
3. Best Practices
Security and modern web development standards. Key checks:
- HTTPS usage.
- No insecure JavaScript libraries.
- Fast page load times.
Improvement Tips:
- Use HTTPS.
- Remove outdated JavaScript libraries.
- Minimize unused code.
4. SEO
Checks technical SEO factors. Key checks:
- Meta descriptions and title tags.
- Mobile-friendliness.
- Structured data markup.
Improvement Tips:
- Ensure pages are mobile-friendly.
- Add structured data for rich snippets.
- Optimize meta tags.