B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
27%
27% -- technical seo failure rate for websites (2025)
27% of websites fail critical technical SEO checks according to SEMrush.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
27%
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
50
Source Trust
60
Citation Chain
60
Independence
30
Methodology
35
Freshness
95
Source
SEMrush
Primary
Tier C
https://mygomseo.com/blog/the-10-point-technical-seo-checklist-every-agency-should-use-before-client… ↗
Source Article
Technical SEO Checklist for Top Search Rankings | MygomSEO
The 10-Point Technical SEO Checklist Every Agency Should Use Before Client Delivery
Picture launching a client website only to discover it's invisible to Google - missing from search results despite weeks of work. This nightmare scenario happens when agencies skip critical technical checks. A techni…
Original Research
SEMrush
· Original study ↗
Methodology
Secondary citation of SEMrush website audit research in an agency blog; no methodology or date details provided. Publication year estimated as 2025.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
websites: 27% technical seo failure rate. Source: SEMrush (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/websites-fail-technical-seo-checks
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<blockquote cite="https://lighthousedata.io/data/websites-fail-technical-seo-checks" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>27%</strong> -- technical seo failure rate for websites<br><small>Source: SEMrush (2025) · <a href="https://lighthousedata.io/data/websites-fail-technical-seo-checks" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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