AI Overviews Cite AI-Generated Content More Than Human Writing

Posted on July 14, 2025
Source: Data & Studies – SEO Blog by Ahrefs by Si Quan Ong. Read the original article

TL;DR Summary of Google’s AI Overviews and Their Reliance on AI-Generated Content

Google’s AI Overviews frequently cite AI-generated or AI-assisted content, with 87.8% of cited pages showing some AI involvement. This is significantly higher compared to general web content, indicating a growing AI content feedback loop. Despite this, Google does not appear to favor or penalize content based on its AI origin when selecting sources. The findings reflect the increasing use of AI in content creation across the web and marketing sectors.

Optimixed’s Overview: Understanding the Growing Influence of AI-Generated Content in Search Results

Key Insights into Google’s AI Overviews and Content Sourcing

Recent research analyzing one million search engine results pages (SERPs) featuring Google’s AI Overviews reveals a notable trend: these AI summaries predominantly cite content that is either fully or partially created by AI. This phenomenon highlights the evolving landscape of online content and the complex relationship between AI-generated material and search engine algorithms.

Detailed Analysis of AI Content Citation

  • Content Categorization: Among the top three cited URLs per overview, 3.6% were purely AI-generated, 8.6% purely human-written, and 87.8% a mixture of AI and human input.
  • AI Intensity Levels: Within mixed-content pages, varying degrees of AI usage were observed, from minimal (1-10%) to dominant (71-99%).
  • Comparison to General Web Content: This citation pattern contrasts with broader web content, where pure AI pages are less frequent and pure human pages more common.

The Implications of an AI Content Ecosystem

These findings suggest the emergence of an AI-driven content ecosystem, where AI-generated content increasingly references other AI-assisted sources, potentially leading to a feedback loop. Google’s AI Overviews reflect the current state of the web, where a majority of new pages include some AI-generated content, and marketing professionals widely adopt AI tools for content creation.

Google’s Approach and Future Considerations

  • Neutral Stance on AI vs. Human Content: Correlation analysis indicates Google neither penalizes nor favors AI-generated content in its AI Overviews.
  • Accuracy Efforts: Google employs grounding techniques and retrieval-augmented generation to improve overview reliability.
  • Content Detection Tools: Tools like Ahrefs’ AI Content Detector help identify AI involvement in web pages, supporting transparency in content origin.

Overall, this research underscores the growing integration of AI in content creation and its ripple effects on search engine results, marking a shift toward a machine-driven content landscape.