What is GEO: How to Appear in ChatGPT and Perplexity

This is the English version of our GEO guide. Generative Engine Optimization targets visibility in AI-generated answers rather than traditional search rankings. Unlike SEO (which earns you a blue link), GEO earns you a citation inside a synthesized answer. Key tactics include factual density, source authority signals, structured data, contextual completeness, and citation-friendly formatting. We cover how generative engines select sources using RAG, the 5 GEO pillars, a Greek law firm case study achieving Perplexity citations in 6 weeks, and a monitoring workflow using the OpenAI API.