How to measure share of answer across AI assistants
A practical method for tracking whether your brand is named and cited by ChatGPT, Perplexity, Gemini, Copilot and AI Overviews — and what the numbers actually mean.
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- Shopify GEO SEO Agency
The first question every merchant asks about GEO is how you would even know if it worked. It is a fair question, and the answer is less exotic than it sounds: you build a rank tracker, except the unit of measurement is a mention rather than a position.
Step one: fix the prompt set
Write 100 to 300 prompts phrased the way a shopper talks to an assistant — full questions with constraints, not keywords. "What's the best waterproof hiking boot for wide feet under $200?" rather than "waterproof hiking boots." Draw them from support tickets, on-site search logs and review questions.
Freeze the baseline set for comparisons. You can add a separate exploratory set, but label it clearly so a change in the questions is not mistaken for a change in visibility.
Step two: control the run conditions
- Record the assistant, displayed model or mode and date. Version details may not be exposed; mark unknowns rather than inventing them
- Use fresh sessions and consistent personalisation settings where available; record conditions you cannot control
- Consistent locale, since answers vary meaningfully by market
- Choose a repeatable schedule appropriate to your decision and budget, and keep it consistent
- Repeat a sample of prompts to observe variability; one answer is an observation, not a stable ranking
Step three: record three things
- Named: did the answer mention your brand at all? This is share of answer.
- Cited: did the answer link your domain? Measure this separately: a source can be linked even when its brand is not named in the answer.
- Displaced by: which domains were cited instead? This is your source gap, and it is the most actionable of the three.
What good looks like
There is no universal target or timeline for share of answer. Establish a baseline for your category and test conditions, then track repeat observations over time. Report raw samples alongside a rolling view, distinguish named mentions from linked citations, and record model changes that might explain movement.
Report answer observations alongside search visits, identifiable AI referrals and commercial outcomes. They measure different stages. A rise in mentions does not establish a rise in revenue, and changes in prompts, products or measurement should be documented before attributing results to the work.
Put this into practice with Shopify SEO and Shopify GEO.
