What is Earned Media Bias?
Short answer: Earned media bias is the strong preference AI models show for citing third-party content (news articles, blog posts, Reddit threads, Wikipedia) over brand-owned content (your website, your blog) when generating answers about brands.
You will learn: Why AI models cite earned media so heavily, what percentage of citations come from outside brand-owned sources, and what this means for how you should think about AEO strategy.
The everyday version
When you ask a friend "what do you think of Brand X?" they don't recite the brand's marketing copy. They tell you what they read about it, what other people said, what reviews looked like. AI models behave the same way. They've been trained on the entire internet, and when they assemble an answer about a brand, they pull from the third-party signal — not the brand's own self-description.
Why this happens
A 2025 University of Toronto study found that 82–89% of AI citations come from earned media, not brand websites. In the US specifically, 92.1% of AI-cited content was earned. This isn't because AI dislikes brand-owned content — it's because AI is trained to value diverse perspectives over self-referential ones, and earned media (news, reviews, third-party analysis) is structurally more diverse than a brand's own marketing.
Search Engine Land's 2025 reporting also found that 60% of AI Overview citations come from pages outside the top 20 organic search results. That means SEO ranking and AI citation are largely different games.
Why this matters for you
If you're optimizing for AEO by perfecting your own website, you're working on the smallest leverage point. The brand voice that AI models echo is built mostly from what other people say about the brand. To actually move the needle on AI brand visibility, you need to influence the earned media layer:
- Get cited in trade press
- Show up substantively in Reddit threads
- Get covered on LinkedIn and Substack by people the AI considers credible
- Have third-party reviews and comparisons that mention you
In practice
Run this audit on your brand: ask ChatGPT a question about your brand. Look at the citations it provides (Perplexity will show them most clearly). What percentage of those citations are your own website vs. third-party content? If your own site dominates, you may be in a situation where the AI doesn't have enough earned media to draw on — and that gap is your strategic opportunity.
What's next
In the next glossary entry, we'll cover The AEO Strategist Role. You'll learn what the emerging AEO Strategist career path looks like, and how to position yourself to grow into it.