Prompt tracking is how merchants turn 'are we in ChatGPT?' into an answerable metric. A prompt panel is 50-500 buyer-intent queries; a harness runs them daily/weekly against ChatGPT, Claude, Perplexity, and AI Overviews; the results feed a dashboard of presence, position, citation link, and sentiment.
Without prompt tracking, GEO work is guesswork. With it, every content change has a measurable before/after.