Research
Research, guides and practical advice on AI search, GEO and AEO.
AI ·
ChatGPT has launched ads: what it means for Korean brands
ChatGPT ads launched in the US in February 2026, and a self-serve Ads Manager rolled out in May. PION breaks down the Korea launch timeline, the ad-answer separation principle, and how Korean brands should respond.
Read article: ChatGPT has launched ads: what it means for Korean brandsResearch ·
Perplexity, Gemini, Claude: how citation patterns differ by engine
Compare how ChatGPT, Perplexity, Gemini, and Claude display citations, including source diversity, update cycles, and optimization signals. Includes a comparison table, detailed analysis of each engine, and PION's priorities for optimizing all four simultaneously.
Read article: Perplexity, Gemini, Claude: how citation patterns differ by engineResearch ·
5 characteristics of pages that AI cites
We lay out, by PION's measurement standards, the five structural characteristics of pages that ChatGPT, Perplexity, and Google AI Overviews frequently excerpt into their answer bodies: definition sentence, heading hierarchy, schema, authoritative citation, and layered structure.
Read article: 5 characteristics of pages that AI citesAbout ·
How PION differs from general SEO agencies and overseas AEO SaaS
We compare PION against general SEO agencies and overseas AEO SaaS (Otterly, Profound, etc.) using the same criteria. PION provides Korean-language prompt measurement, an in-house publishing engine, and a complete cycle of measurement, creation, publishing, and remeasurement.
Read article: How PION differs from general SEO agencies and overseas AEO SaaS