B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
12%
12% -- seo improvement rate for websites with web accessibility (2025)
Web accessibility improves SEO by 12% according to a study by SEMRush.
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Lighthouse Research Team
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Source verified
Evidence graded
Value
12%
Unit
Percentage
Data Vintage
2025
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
SEMRush
Primary
Tier B
https://www.philpallen.co/blog/is-your-website-accessible-to-everyone ↗
Source Article
Stay Ahead of Instagram’s Latest Algorithm Changes for 2025
Essential Tips and Best Practices for Website Accessibility
“Is my website accessible to everyone?”
That’s a question you should ask yourself when creating or updating your website. Did you know that legal action can get taken against your business if you’re not designing with inclusivity in mind?
I…
Original Research
SEMRush
· Original study ↗
Methodology
Cited study by SEMRush on web accessibility impact on SEO
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
websites with web accessibility: 12% seo improvement rate. Source: SEMRush (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/web-accessibility-seo-improvement-semrush
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<blockquote cite="https://lighthousedata.io/data/web-accessibility-seo-improvement-semrush" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>12%</strong> -- seo improvement rate for websites with web accessibility<br><small>Source: SEMRush (2025) · <a href="https://lighthousedata.io/data/web-accessibility-seo-improvement-semrush" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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