In GEO tooling, prompt sets are the unit of analysis. A team picks 50–500 prompts that represent the buying-stage queries their audience actually asks ("best GEO tool for ecommerce", "Semrush vs Ahrefs Brand Radar"), then tracks model responses to those prompts over time. The same prompts re-run on a cadence let teams see drift in citation patterns and brand presence.
GEO glossary
Prompt
A prompt is the natural-language input a user types or speaks into an AI engine, the question or instruction that triggers a generated answer.