What is AI visibility and how is it measured?

"AI visibility" is a phrase from tool dashboards and agency proposals, and it almost always arrives with a number next to it. Behind it is a question any store understands: when a customer asks an assistant to recommend a product in your category, do you show up? It is not the SEO visibility of old, which is calculated from positions in a list of results, or the traffic that reaches your site. It is presence inside the answer. And you should know from the start that it has no single definition: each tool, each study and each search engine counts it its own way, so the figure only makes sense next to its method.

What it includes

A brand can be present in a generated answer in three different ways, and each is counted in a different unit:

• As a linked source. The answer carries a link to one of your pages next to the sentence it backs: an AI citation. It can be clicked and can end in a visit.
• As a named mention. The answer names your brand or your product without linking any page. It can weigh on the reader's decision, but it leaves no trace in your analytics.
• As a link shown in Google's AI features. Google counts a search impression each time a link to your site is shown in AI Overviews or in AI Mode.⁠^{[1]Search Console Help. Generative AI performance report (Search)}

What the search engines give you, first-hand. The generative AI performance report in Search Console gives your site's impressions in AI Overviews and in AI Mode, by page, country, device and date, without clicks or queries. Google opened it to all sites on August 31, 2026, and it only appears if the site accumulates enough impressions in those features and is not excluded from them.⁠^{[1]Search Console Help. Generative AI performance report (Search)} The AI Performance report in Bing Webmaster Tools, in public preview since February 10, 2026, counts citations: how many times your content appears as a source in Copilot, in Bing's AI-generated summaries and in some partner integrations, how many of your pages are cited on average per day, the phrases the AI used to retrieve your content, the citations for each URL and how they change over time. Bing presents it with an idea that sums the term up: visibility is no longer just about blue links.⁠^{[2]Microsoft, Webmaster Tools blog. Introducing AI Performance in Bing Webmaster Tools Public Preview}

What you measure by asking. In ChatGPT, Gemini, Perplexity or Claude, visibility is measured by running queries and reading what they answer, which is what tracking tools do. That measure is a sample that someone designs: which queries, in which assistants, how many times, what counts as presence. Google adds a warning that holds for any dashboard: no third-party tool has access to its internal ranking or AI systems, and it asks you to be wary of those that promise rankings or claim to use internal Google metrics.⁠^{[3]Google Search Central. Optimizing your website for generative AI features on Google Search}

Why there is no formula. Not even the academic work that gave GEO (Generative Engine Optimization) its name takes one for granted: it presents itself as a framework for optimizing content visibility in generative engine responses and for defining their visibility metrics. Its most quoted figure, that GEO can boost visibility by up to 40%, is measured with the metrics the paper itself defines.⁠^{[4]arXiv (Aggarwal, Murahari, Rajpurohit, Kalyan, Narasimhan and Deshpande; KDD 2024). GEO: Generative Engine Optimization} Google, for its part, describes AEO (Answer Engine Optimization) and GEO as the work centered on improving visibility in AI search experiences, and assigns no measure to it.⁠^{[3]Google Search Central. Optimizing your website for generative AI features on Google Search}

In a store

A backpack store gathers in one table, for a single product page and a single month, everything it can know about its AI visibility. It is a fictional example: the product page and the figures are made up to show that each source counts a different thing.

Five rows, four units: impressions, citations, mentions and links. They are not added or averaged, and any "visibility index" that merges them into one number has made decisions worth knowing about. What the table does say is useful: the product shows up in ChatGPT far more than it is linked, so many of those appearances cannot bring a visit. And it is built by product, not by brand: a store gets more from knowing which product pages assistants name than from knowing how many times its name comes up.

How to check it

1. Open the Search Console generative AI performance report and filter by your most important product pages and categories. If it does not appear, the site may not yet accumulate enough impressions or may be excluded from those features.⁠^{[1]Search Console Help. Generative AI performance report (Search)}
2. If your site is verified in Bing Webmaster Tools, open AI Performance and look at which URLs are cited and with which retrieval phrases.⁠^{[2]Microsoft, Webmaster Tools blog. Introducing AI Performance in Bing Webmaster Tools Public Preview}
3. Set up a fixed panel of purchase queries, without your brand, and always run them the same way in ChatGPT and in Gemini, in new chats and on several days. Note the named products and the cited URLs separately. Clione asks this question for you: it asks ChatGPT and Gemini what shoppers ask and shows whether they name the store's products, whether they keep recommending it when the shopper asks them to compare and pick one, and who takes its place when they stop.
4. When a tool or an agency gives you a figure, ask for the method: the queries, the assistants, the repetitions, the dates and what counts as presence. Without that, the number cannot be compared with any other.
5. Cross-check presence against visits. If the answers name you and your analytics shows no visits from assistants, the presence is mostly unlinked mention.

Related concept: AI share of voice

AI share of voice starts from the same presence and sets it against your competitors': of all the space brands take up in the answers of your market, what share is yours. AI visibility looks at it on its own: whether you appear, where and how. The two can move in opposite directions. If the answers in your category start naming more brands, you can show up more often than before and still hold a smaller share of the total. Visibility says whether you are there; share of voice, how much of the space is yours.

To keep going, the measurement and verification reading path orders the rest of the terms, and the entry on attribution of visits that arrive from AI explains how to tell whether that presence ends in orders.