Understanding Lighthouse scores
Performance, Accessibility, Best Practices and SEO are scored 0 to 100 by Google Lighthouse; 90 or above is good.
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Each audit uses Google Lighthouse via PageSpeed Insights.
- Performance: how quickly the page loads and becomes usable.
- Accessibility: whether people using assistive technology can use the page.
- Best Practices: security and modern web standards.
- SEO: basic signals that help search engines understand the page.
Scores of 90 to 100 are good, 50 to 89 need improvement, and below 50 are poor. Performance scores vary a little between runs because network conditions vary, so look at trends rather than single results.
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