Proof Signal Blog

Insights on GEO, AI search, and AI visibility

Practical writing on how businesses can become easier for ChatGPT, Google AI Overviews, Perplexity, and other AI tools to understand and recommend.

Google Killed `llms.txt`. ChatGPT, Claude, and Perplexity Didn't.

Google said llms.txt doesn't affect rankings on June 15 — true for Google. ChatGPT, Claude, and Perplexity use different signals. Here's what that half-truth means for your busi...

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You're Ranking on Google. AI Doesn't Know You Exist.

Ranking on Google doesn't mean AI tools can find or recommend you. Here's the structural mismatch between Google ranking signals and what AI systems actually need to cite a busi...

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AI Overviews Are Creating a New Kind of Reputation Risk

AI Overviews can surface negative reviews and brand criticism even when users never asked for it. Here's why reputation now needs to be managed as an AI visibility problem.

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AI Search Traffic Is Rising Fast. That’s Not the Real Story.

AI traffic is growing, but the deeper shift is retrieval at query time. Here's why local businesses need to be built for AI answers, not just indexed pages.

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Planning for Zero Search Traffic Is Not Crazy Anymore

Search traffic is getting crowded out by AI answers, platform modules, and answer surfaces. Here's why local businesses should plan for a world where Google sends less traffic.

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Is Your Business Invisible to AI? Here's How to Find Out in 5 Minutes.

Run this quick test to find out whether AI search tools are recommending your business — and what to do if they're not.

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The Answer Economy Is Here. Is Your Business in It?

The internet is shifting from a link economy to an answer economy. Here's what that means for local businesses and why being cited in AI answers is now a revenue question, not a...

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Your Analytics Can't Tell You If AI Is Selling Against You. Here's Why That Matters.

The attribution gap in agentic search means your analytics is blind to the AI conversations shaping your customers' decisions. Here's what local businesses need to understand.

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