Arjan ter Huurne

Our own panel puts Reddit's ChatGPT citation drop at 97%, finds no matching decline on any other engine, and shows Wikipedia went to zero in the same window.

This week in AI Search: ChatGPT Ads open in 31 European markets, Reddit citations collapse 96.9% in ChatGPT, and AI crawlers ignore JavaScript links.

Launch of PromptAds - the ChatGPT Ads Library for Europe

Publication of an article in De Telegraaf, with an interview of Arjan ter Huurne. The article talks about the launch of ChatGPT Ads in Europe.

This week in AI Search: ChatGPT names brands before searching, its fetch bot ignores robots.txt, Anthropic watermarks Claude, and Shopify counts AI referrals.

This week in AI Search: the IAB publishes AI visibility measurement guidelines, research shows ChatGPT over-indexes English pages, and ChatGPT Ads grows up.

This week in AI Search: ChatGPT Ads expand to five new markets, AI Overviews reach 43% of US searches, France reacts to AI Mode, and a noindex lesson.

A five-layer framework for measuring AI Search impact, from crawler access and model visibility to referrals, surveys and customer insight.

Half of B2B software buyers now start in AI Search. What that means for attribution, AEO, GEO, and brand representation in the generative era.

Marketing strategy is entering a rare moment of reset. When AI mediates discovery, brands are no longer competing for attention - they are competing for interpretation and selection.

Traditional SEO rankings are becoming less relevant as AI systems synthesize answers. The new metric is machine trust - and earning it requires a different approach.

AI agents are beginning to make purchase decisions on behalf of consumers. Here is what that means for brand strategy and how to prepare.

In generative AI experiences, users don't click ten blue links. They ask AI systems a question and get an answer. This shift demands a new way of understanding visibility.

In Q4 2025, I founded PromptMarketing because something fundamental in search had changed. This wasn't another algorithm update - it was a structural shift. When AI speaks for your brand, you lose control.