Generative Engine Optimization (GEO) is a sibling discipline to AEO focused on the phrasing, structure, and evidence patterns that make LLM answer engines quote a source verbatim.
In practice GEO and AEO overlap heavily; where they differ, GEO leans toward content craft (self-contained sentences, explicit attributions, quantified claims) while AEO leans toward the machine-readability stack (schema, canonical, entity graph).
See our deep dive: What is GEO?