Brief 1 of the GEO Case Studies series. Wikipedia wasn't built for AI citation — but its structure, sourcing standards, and entity architecture make it the single highest-leverage AI citation investment available.
Reddit is the second-most cited consumer-facing source in AI answer engines, behind Wikipedia. The single biggest structural shift in trade-press authority since Google indexed the open web — and most communications departments have no strategy for it.
Dollar Shave Club won attention. It lost retrieval. The case study in retrieval decay — and the framework for every brand becoming historical inside ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews.