B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
80%
80% -- share of seo changes with no impact or negative traffic for SEO website changes (2025)
Around 80% of SEO-motivated website changes result in either no impact or a decrease in organic traffic.
- Most changes tested were made without testing beforehand
- Approximate figure ('around 80%')
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
80%
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
20
Independence
30
Methodology
45
Freshness
95
Source
SearchPilot
Primary
Tier C
https://kirro.io/cro-seo ↗
Source Article
CRO SEO: Boost Conversions Without Hurting Rankings
CRO and SEO aren’t rivals. But they’re not best friends either. Conversion rate optimization (the meaning of CRO: getting more visitors to buy, sign up, or click) and SEO (getting those visitors in the first place) share the same levers. Page speed. Mobile design. Content quality. Most of the time t…
Original Research
SearchPilot
· Original study ↗
Methodology
SearchPilot SEO A/B testing data, cited by Kirro
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
SEO website changes: 80% share of seo changes with no impact or negative traffic. Source: SearchPilot (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/seo-changes-no-impact-or-negative
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<blockquote cite="https://lighthousedata.io/data/seo-changes-no-impact-or-negative" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>80%</strong> -- share of seo changes with no impact or negative traffic for SEO website changes<br><small>Source: SearchPilot (2025) · <a href="https://lighthousedata.io/data/seo-changes-no-impact-or-negative" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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