B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
12%
12% -- organic traffic loss for news/publishing sites with high content replication (2025)
News sites with high levels of content replication (>30% of articles duplicated) experienced an average 12% traffic loss over six months.
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
12%
Unit
Percentage
Data Vintage
2025
Entity
Sample Size
200
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
45
Freshness
95
Source
NineStats
Primary
Tier C
https://ninestats.com/organic-traffic-loss-duplicate-content/ ↗
Source Article
Organic Traffic Loss from Duplicate Content: A Quantitative SEO Study
Duplicate content is one of the most persistent issues affecting search engine optimization, with measurable consequences for organic traffic and website performance. While search engines do not typically impose direct penalties for duplicated content, multiple studies indicate that it can significa…
Original Research
NineStats
· Original study ↗
Methodology
Analysis of 200 news sites with >30% articles appearing in multiple sections/domains, over six months
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
news/publishing sites with high content replication: 12% organic traffic loss. Source: NineStats (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/news-sites-duplication-traffic-loss
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<blockquote cite="https://lighthousedata.io/data/news-sites-duplication-traffic-loss" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>12%</strong> -- organic traffic loss for news/publishing sites with high content replication<br><small>Source: NineStats (2025) · <a href="https://lighthousedata.io/data/news-sites-duplication-traffic-loss" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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