B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
85%
85% -- organic traffic loss for Sites with mass-produced AI content lacking expert oversight (Dec 2025 Core Update) (2025-12)
Sites with mass-produced AI content lacking expert oversight experienced an 85–95% organic traffic loss following the December 2025 Google Core Update.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
85%
Unit
Percentage
Data Vintage
2025-12
Entity
Sample Size
150
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
ALM Corp
Primary
Tier C
https://inclick.pl/kiedy-zlecic-audyt-seo/ ↗
Source Article
Kiedy zlecić audyt SEO? 12 sygnałów, że Twoja witryna go potrzebuje [2026]
Optymalny moment na audyt SEO to nie ten, w którym ruch już spadł o 40%. To ten, w którym zauważasz pierwsze niepokojące sygnały — stagnację pozycji, spadek CTR, malejącą liczbę zapytań ofertowych mimo stałego ruchu. W tym artykule opisujemy 12 konkretnych sytuacji, w których audyt SEO staje się kon…
Original Research
ALM Corp
· Original study ↗
Methodology
ALM Corp analysis of 150+ sites; midpoint of 85–95% range
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Sites with mass-produced AI content lacking expert oversight (Dec 2025 Core Update): 85% organic traffic loss. Source: ALM Corp (2025-12). Via Lighthouse Intelligence -- https://lighthousedata.io/data/ai-content-mass-produced-traffic-loss-2025
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<blockquote cite="https://lighthousedata.io/data/ai-content-mass-produced-traffic-loss-2025" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>85%</strong> -- organic traffic loss for Sites with mass-produced AI content lacking expert oversight (Dec 2025 Core Update)<br><small>Source: ALM Corp (2025-12) · <a href="https://lighthousedata.io/data/ai-content-mass-produced-traffic-loss-2025" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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