Welcome to The GEO Show, the briefing on Generative Engine Optimization and AI visibility. Brought to you by GEOforge.

In this solo roundup, Paris Childress, founder of Hop AI and co-founder of GEOforge, leads with Google's new Business Agent for YouTube ads, then covers seven more stories: Criteo's ChatGPT Ads data, ZenMedia, a machine relations citation index, Google's developer knowledge agent skill, Athena HQ, Ahrefs, and free GEO audit tools.

In this episode:

• 📢 ChatGPT Ads crosses 2,000 brands through Criteo
  Criteo says more than 2,000 brands now advertise on ChatGPT through its integration, which has expanded to 61 markets. It reports click-through rates two to three times higher than comparable formats, roughly four times higher spend after activating prompt smart ads, and more than 80% of ad-driven traffic from new customers. These are Criteo-reported figures, not an independent benchmark, but they are the first sizable ChatGPT Ads data set.
• 📉 One blended visibility score hides a 44-point engine gap
  ZenMedia tracked 900 buyer intent prompts across ChatGPT, Claude, Gemini, Perplexity, and Grok. In one campaign, the same brand appeared in 15.5% of prompts on its weakest engine and 59.5% on its strongest, while the five-engine average was 45.6. Paris argues a single blended share of voice number is basically meaningless: optimize engine by engine, or at least split ChatGPT from Google.
• 🎬 Google makes YouTube ads conversational
  Google introduced Business Agent for YouTube ads, so viewers can ask a conversational AI questions about products or brands without leaving the video. Paris calls it the most important story of the day and predicts YouTube ads will start appearing in Google AI Mode and possibly AI Overviews, blurring the line between organic and paid GEO.
• 🏢 Vendor-owned sites lead the top 100 cited domains
  A machine relations index found 29 of its 100 most cited domains are vendor-owned, versus 22 editorial publications and 16 market and company databases. It shows composition, not causation, but it cuts against the earned-media-only narrative and argues owned content still deserves real investment.
• 🤖 Google turns its documentation into an agent tool
  Google released a retrieving developer knowledge agent skill that teaches AI coding assistants to pick the right developer knowledge MCP tool, handle retrieval errors, and fall back to its REST API. Canonical knowledge is moving from web pages to resources agents can call directly, like MCP endpoints, APIs, and retrieval-ready product data.
• 📈 Athena HQ's Rootly case study raises the proof bar
  Athena HQ reports Rootly's citation rate rose from 3% to 30% across tracked prompts and its mention rate from 7.5% to 18% within months. There is no published control group, fixed prompt list, or attribution, but the category is still short on case studies.
• ▶️ YouTube appears in 22.5% of Google AI Overviews
  Ahrefs tracked 4.2 million Google AI Overview responses: YouTube appeared in 22.5%, Reddit 10%, Wikipedia 7%, Facebook 6%, and LinkedIn just 0.6%. Paris says video is the number one strategy for winning visibility in AI Overviews, and a brand-new video that nails the prompt can still win the citation.
• 🆓 Free GEO tooling compresses the audit layer to zero
  Optimize.ai is promoting a free GEO platform that checks 50-plus AI search signals, audits up to 15 pages, and generates files like llms.txt, robots.txt, and FAQ schema. Measuring AI visibility is becoming commodity infrastructure, so the value moves to execution and strategy.

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💬 Question: Would you talk to a YouTube ad if it could actually answer your questions?