B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
29%
29% -- duplicate content share for Internet content (2025)
According to Fifteen Design, 29 percent of content on the Internet is duplicate content.
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Lighthouse Research Team
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Source verified
Evidence graded
Value
29%
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
45
Freshness
95
Source
Fifteen Design
Primary
Tier C
https://www.aronsonads.com/blog/duplicate-content-bad-for-your-brand-overcome-it/ ↗
Source Article
Why Duplicate Content is Bad for Your Brand, and How You Can Overcome It | Aronson
When you were in high school or even college, did your professors warn you against plagiarizing your papers and essays, and instead encourage you to be creative with your words, thoughts, and ideas? Plagiarism is a serious offense on campuses, even resulting in serious punishment or getting kicked o…
Original Research
Fifteen Design
· Original study ↗
Methodology
Cited from Fifteen Design; methodology not stated
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Internet content: 29% duplicate content share. Source: Fifteen Design (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/duplicate-content-share-internet
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<blockquote cite="https://lighthousedata.io/data/duplicate-content-share-internet" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>29%</strong> -- duplicate content share for Internet content<br><small>Source: Fifteen Design (2025) · <a href="https://lighthousedata.io/data/duplicate-content-share-internet" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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