If you are hoping your brand homepage will magically appear in ChatGPT or Perplexity answers, you are likely missing the point. According to a new guide from Depra, AI engines do not cite your brand because you have a pretty website. They cite you because other websites that AI engines trust are already mentioning you. The key is to get your brand named on the pages AI engines already use as sources, such as best-of lists, marketplace listings, and review videos. This is a shift from traditional SEO where you controlled your own domain; now, you must influence the ecosystem around you.

Brand Mentions Beat Backlinks

The old SEO playbook relied heavily on backlinks, but AI engines play by different rules. Ahrefs studied 75,000 brands and found that brand web mentions correlated with visibility in Google AI Overviews at 0.664, compared to just 0.218 for backlinks. This suggests that PR, reviews, and community presence are far more valuable for AI visibility than traditional link building. A mention counts even if it does not have a hyperlink. You need to track these mentions like you used to track backlinks, noting which sites name you and whether they describe your product correctly.

Every Engine Has Its Own Sources

Do not assume that being cited by one AI engine means you are safe across the board. Kevin Indig’s research showed that only 2.37% of cited URLs appeared in all three major enginesβ€”ChatGPT, Perplexity, and Google AI Overviewsβ€”for the same prompt. In a separate study of Indian shopping answers, Depra found that 89.8% of cited pages were used by only one engine. Perplexity, for instance, cited YouTube 518 times in their dataset, while ChatGPT barely linked to it. You must decide which engines your buyers use and target each one’s specific source preferences individually.

Why llms.txt Is Not the Silver Bullet

Many developers are rushing to publish llms.txt files, hoping to guide AI bots to their content. However, the evidence suggests this is largely wasted effort. Ahrefs checked 137,210 domains and found that 97% of llms.txt files received zero requests in May 2026. Furthermore, AI retrieval bots made up only 1.1% of the requests that did arrive. While publishing the file is harmless, it does not count as real progress. Your energy is better spent on on-page optimization that makes your content easy to quote, such as answering buying questions in the first two sentences and using plain text for specs and prices.

Citations Are Ephemeral

If you manage to get cited, do not expect it to last. SISTRIX tracked over 82,000 prompts and found that ChatGPT Search replaced 74% of its cited domains every week. In Google AI Mode, the turnover was 56%. This volatility means a one-off PR push gives you a very short spike in visibility. To maintain a presence, you need a steady flow of new mentions on the websites each engine keeps returning to. You must check your sources every week because the landscape changes rapidly.

Key Takeaways

  • Brand mentions correlate more strongly with AI visibility than backlinks do.
  • AI engines rarely agree on sources; 91% of URLs appear in only one engine.
  • llms.txt files are largely ignored, with 97% receiving zero requests.
  • Citations are unstable, with ChatGPT replacing 74% of sources weekly.
  • On-page work should focus on making content easy to quote with clear answers and data.

The Bottom Line

Stop chasing backlinks and start chasing brand mentions on the specific sites each AI engine trusts. Because citations vanish within a week, you need a weekly monitoring routine rather than a one-time campaign.