AI Overviews are everywhere. If you’ve Googled anything recently, you’ve probably seen a big, AI-generated summary right at the top of the results. And with more users relying on AI tools like ChatGPT, Perplexity, and Google’s AI Overviews to answer questions, where these tools get their information from is more important than ever.
That’s why a new study by marketing research platform Profound caught our attention. After analyzing 30 million citations across the top AI platforms, Profound uncovered a surprising truth: not all AI platforms treat sources the same. In fact, platforms like ChatGPT, Google AI, and Perplexity pull from completely different types of content.
If you care about SEO, PPC, brand authority, or AI visibility, this is a wake-up call. Your blog might not be the star of the show anymore.
What Did Profound’s Study Reveal?
Profound looked at how ChatGPT, Google AI Overviews, and Perplexity source the information they present to users. They analyzed over 30 million citations between August 2024 and June 2025.
The goal of the research was to understand which platforms rely on which sources, and what that means for marketers who want to stay visible in an AI-dominated search landscape.
Here’s the high-level view of which sources dominate each AI tool:
| Platform | Top Source | Key Insight |
| ChatGPT | Wikipedia | Heavy reliance on structured content |
| Google AI Overviews | More balance between community, video, and traditional media | |
| Perplexity | Strong preference for user-generated content |
Google AI Overviews Rely On Reddit and YouTube
Profound’s research shows that Google’s AI Overviews are deeply integrated with community content and video:
- Reddit: 21%
- YouTube: 18.8%
- Quora: 14.3%
- LinkedIn: 13%
- Wikipedia and Forbes: ~5.7% each
This leads to an uncomfortable truth for content marketers: Once the backbone of SEO strategies, blogs are no longer the primary source of information for Google’s AI-generated answers. Instead, the AI is pulling heavily from platforms like Reddit, YouTube, and Quora. These are spaces where real people are having real conversations, sharing opinions, and asking questions.
In practical terms, this means that even the most well-optimized blog post might get pushed aside by a Reddit thread or a YouTube comment section when Google AI decides what to display.
For content marketers, it’s a wake-up call: Traditional blogging alone won’t cut it in the era of AI-first search. If your goal is visibility, you need to rethink where and how you’re showing up, especially in the platforms AI trusts most.
ChatGPT Loves Wikipedia
ChatGPT is all about structure and reliability. According to Profound’s data, Wikipedia makes up 47.9% of ChatGPT’s top 10 sources.
Other notable mentions include:
- Reddit (11.3%)
- Forbes (6.8%)
- G2 and TechRadar (6.7% and 5.5%)
So if you’re aiming to show up in ChatGPT’s responses, your best bet might be maintaining or contributing to well-sourced, accurate Wikipedia pages. It’s also a sign that traditional authority still matters—at least on this platform.
Perplexity Loves Community Content
Perplexity takes the Reddit love to the next level. Nearly half of its top citations (46.7%) come from Reddit. Its top 10 list also includes:
- YouTube (13.9%)
- Gartner (7%)
- Yelp, LinkedIn, Forbes, TripAdvisor, G2
This platform seems laser-focused on real-world user experiences and reviews. From Reddit threads to TripAdvisor and Yelp, it’s pulling from spaces where people talk openly about products and services.
TLDs: .com Still Rules, But .ai and Country Domains Are Gaining
Profound also analyzed top-level domains (TLDs) cited by ChatGPT. The results weren’t surprising, but they are still relevant:
- .com: 80.41%
- .org: 11.29%
- .uk, .io, .ai: small but growing shares
What this means: even if .ai or .io feel trendier, the bulk of citations still come from .com sites. However, tech-focused domains are showing up more and more, and that’s something to keep an eye on.
Strategic Takeaways for Marketers and SEO Professionals
This shift in how AI tools select and cite content is a sign of where things are headed. If your content isn’t visible to AI, it might as well not exist. So, what can marketers, PPC professionals, and SEO experts do about it?
Tip 1: Tailor Your Strategy by Platform
Each AI system has a different “taste” in content:
- ChatGPT: Focus on structured sources like Wikipedia and business media.
- Google AI: Prioritize Reddit, YouTube, Quora, and LinkedIn content.
- Perplexity: Go all-in on community engagement and real-world reviews.
Tip 2. Rethink Your Content Distribution
It’s not just about blogs and landing pages anymore. Start thinking of Reddit threads, YouTube videos, and even LinkedIn posts as part of your SEO plan.
Don’t put all your content eggs in your website’s basket. The most valuable content might live off-site, but still drive AI visibility.
Tip 3. Engage With Communities
Reddit isn’t just a content goldmine—it’s a visibility channel now. The same goes for Quora, LinkedIn groups, YouTube comment sections, and more.
Show up where people are talking. Add value. Be part of the conversation, not just a brand shouting into the void.
Final Thoughts: Visibility in the Age of AI Starts Before the Click
If you’re running PPC campaigns and investing in SEO, your content strategy now has a third priority: AI visibility. AI Overviews, ChatGPT, and Perplexity aren’t just “answer boxes,” they’re shaping what users see, what they trust, and what they don’t need to click.
That means you need to think beyond rankings and start thinking about citability.
And while you’re rethinking your strategy, don’t forget about click fraud. Platforms may be getting smarter, but bots and bad actors are still out there wasting ad spend. That’s where ClickGUARD comes in—to protect your budget while you focus on what really matters: visibility, engagement, and results.
