Back to Insights
news
8 min read

Cloudflare's Push to Block AI Overviews

September 24, 2025
MonitoringSEOAI

Why Are Publishers Concerned About AI Overviews?

Google's AI Overviews generate answers directly on the results page. Unlike traditional snippets, they can provide full responses without a click-through. Publishers argue this reduces traffic and undermines the search value exchange. One analysis warned that AI Overviews risk eroding visits while providing little in return. For SEO professionals, that means potential losses in visibility, ad revenue, and conversions.

What Cloudflare Is Proposing

Cloudflare, which serves roughly 20% of websites, introduced a Content Signals Policy to give publishers more control. The policy extends robots.txt with new directives that let sites specify how their content may be used. The signals differentiate between indexing for search, inclusion in AI-generated answers, and training datasets.

For example, a site could allow search indexing (search=yes) but forbid AI answers (ai-input=no) and AI training (ai-train=no). Cloudflare has already added default rules such as "search=yes, ai-train=no" to millions of domains. The policy text is open-source, and tools like ContentSignals.org help publishers generate directives.

This is not an enforcement mechanism; it is a "Do Not Disturb" sign. Compliance still depends on crawlers voluntarily respecting the signals.

How the Content Signals Work

New Directives in Robots.txt

Cloudflare's system introduces three machine-readable directives:

  • search – controls traditional search indexing
  • ai-input – controls use in AI answers
  • ai-train – controls use in training datasets
  • Each can be set to yes or no, and the managed service applies defaults automatically.

    Simple Implementation

    Cloudflare customers see the signals added to robots.txt automatically. Others can add them manually. The text is released under a CC0 license to encourage adoption.

    Expert Perspectives

    Skepticism About Google's Cooperation

    The critical question is whether Google will honor these directives. Googlebot handles both indexing and AI features, so splitting functions complicates its systems. Google has made no commitment so far, and many observers doubt it will comply. Without Google's cooperation, the signals remain mostly symbolic.

    Why Supporters See Value

    Cloudflare CEO Matthew Prince argues the signals could form a contract with legal implications if ignored. The policy references EU copyright law, hinting at potential leverage. Supporters note that widespread adoption forces platforms to choose between honoring the signals or facing pushback from publishers.

    Publisher Reaction

    Hope for Control

    Many publishers welcome the policy as a step toward restoring balance. Cloudflare frames AI reuse as a free-rider problem where companies exploit content without compensation. The signals let publishers say yes to indexing but no to AI reuse, creating leverage that did not exist before.

    A Cautious "Wait and See"

    Others remain skeptical. Industry coverage notes that the policy aims to block Google from using content in AI Overviews, but success depends on Google complying. Some fear that opting out could even reduce visibility, though there is no evidence yet. For now, many adopt the defaults and monitor results.

    Google's Position

    Silence So Far

    Google has not publicly addressed Cloudflare's proposal. When asked, Google emphasizes that AI Overviews send "higher quality traffic," but offers no mechanism for opting out of AI use while remaining indexed.

    Likely Course of Action

    Most experts expect Google to ignore the signals, at least initially. Allowing widespread opt-outs could weaken AI results. Still, Google has compromised before under legal or market pressure. If adoption grows or regulators act, Google might introduce its own supported setting.

    SEO and Content Strategy Implications

    Changing Traffic Patterns

    AI Overviews may reduce clicks, especially for informational queries. Ranking first no longer guarantees visits if the answer appears in the overview. Google argues that the remaining clicks are more engaged, but publishers counter that volume matters for revenue. SEO strategies must account for visibility inside AI-generated responses.

    Should Publishers Use Content Signals?

    Implementing signals carries little risk. Cloudflare defaults already block AI training for many sites. Adding ai-input=no may not stop Google today, but it documents non-consent for future negotiations. Publishers that depend heavily on Google may prefer caution, while others will set explicit rules immediately.

    Adapting Strategy

    Beyond signals, publishers should emphasize assets AI cannot easily replicate: exclusive data, interactive tools, and deeper insights. Concise answers should pair with unique value that encourages clicks. Monitor analytics to identify where AI Overviews impact traffic most. Diversify beyond Google through newsletters, social platforms, and alternative search engines.

    Conclusion

    Cloudflare's Content Signals Policy highlights publishers' demand for control in the AI era. Whether Google complies is uncertain, but the move sets a precedent and pressures platforms to respect stated preferences. For SEO professionals, the takeaways are clear: implement the signals where they align with your goals and prepare for continued shifts in traffic as AI reshapes search.