Every destination marketer has been asked some version of the same question this year: how much of our traffic comes from AI? Until recently the honest answer was “we can’t tell”. In 2026 Google Analytics 4 and Search Console both added AI reporting, and with an hour or two of setup a destination team can have a baseline before the summer holidays.

This guide is for the person who owns the GA4 property, not for a developer. It covers what the tools now report, what they can’t, and a five-step setup.

What changed in 2026

GA4 has an AI Assistant channel. On 13 May 2026, Google added it to GA4’s default channel group (Google Analytics, What’s new⁠ (opens in a new tab)). Google defines it as the channel by which users arrive “from sources like ChatGPT, Gemini, Deepseek, Copilot, or Grok”, and adds a line that matters: it “excludes Google’s AI Overviews and AI Mode” (Google Analytics, Default channel group⁠ (opens in a new tab)). Sessions in the channel get the medium ai-assistant.

ChatGPT tags its links. OpenAI says ChatGPT automatically adds utm_source=chatgpt.com to referral URLs (OpenAI Help⁠ (opens in a new tab)), so its visits are identifiable even in reports built before May.

Search Console counts Google’s AI features. Since June 2025, clicks and impressions from AI Mode count towards the totals in Search Console’s Performance report (Google Search Central⁠ (opens in a new tab)). A separate Generative AI performance report shows how often links to your site appeared in AI Overviews and AI Mode. It shows impressions only, not clicks, and Google says it had reached all websites worldwide by 31 August 2026, though not every property has access yet and low-traffic sites may not qualify (Search Console Help⁠ (opens in a new tab)).

What you still can’t see

Be clear about the gaps before you report a number upward.

  • Google’s own AI clicks sit inside Organic Search. A Visitor who clicks a link in an AI Overview or AI Mode arrives as organic traffic. GA4 can’t separate them; Search Console’s impressions are the closest you will get.
  • Answers that end the search leave no trace. When an assistant tells someone your festival runs on the second weekend of March and they never click, your analytics see nothing.
  • Some assistants strip the referrer. Traffic from apps and some browsers arrives as Direct. Your AI numbers are a floor, not a total.

The measurement still works as a trend line, which is what a board needs anyway.

A five-step setup

1. Find the channel. In GA4, open Reports, then Acquisition, then Traffic acquisition, and set the primary dimension to Session default channel group. Look for AI Assistant. If your property uses a custom channel group, check that it includes an equivalent rule, or the sessions may land in Referral.

2. Build a segment for history. The channel describes sessions from May onwards, and Google’s announcement doesn’t say it relabels older data. For a longer view, create an Exploration with a filter on Session source that matches a regular expression such as chatgpt|openai|perplexity|gemini|copilot|claude|deepseek|grok. Then open your Referral report and add any other assistant domains you find. That segment gives you a like-for-like line back to the start of the year.

3. Count what matters to Operators. Page views don’t pay anyone. Mark the actions that send a Visitor on as key events: clicks to an Operator’s website, phone and email links, and booking links. GA4’s enhanced measurement already records outbound clicks as a click event with the destination in link_domain. To count Operator clicks as their own key event, go to Admin, then Events, then Create event: name it (for example operator_click), match event_name equals click, and add a condition on link_domain for the Operator domains you care about, or outbound equals true for all of them. Then mark the new event as a key event, and compare the rate of those key events for AI Assistant sessions against Organic Search.

4. See where assistants land people. Run the Landing page report filtered to the AI Assistant channel. On most destination sites that is a Product page, an event or a practical page about parking, the first ferry of the morning or opening hours, and seldom the home page. Those pages are your AI front door, so check that each one is current and has a clear next step.

5. Add Search Console. Link Search Console to GA4 if you haven’t, and open the Generative AI performance report monthly. Rising impressions with flat clicks means you are being shown and read but not visited, which tells you something about how complete your answers already are.

What to expect, and what to report

Expect small numbers. In Adobe’s US data, AI traffic to travel sites grew fast from a low base, and those visitors stayed 70% longer per visit while converting 28% less than visitors from other sources (Adobe, May 2026 data⁠ (opens in a new tab)). In Australia, uptake is earlier still: 12% of Australians told the Europ Assistance Holiday Barometer they had used AI to plan or book a holiday (reported by The Canberra Times, April 2026⁠ (opens in a new tab)).

For the board, three lines a quarter are enough: AI Assistant sessions and their trend, the Operator key-event rate for those sessions against Organic Search, and AI Overview and AI Mode impressions from Search Console. If one Product page brings most of the AI traffic, say which one.

What not to report: a share of “AI visibility” from a tool that can’t show its method, or any promise that the number will rise. Nobody controls what an assistant recommends.

A one-page checklist

  1. The AI Assistant channel appears in Traffic acquisition, or your custom channel group has an equivalent rule.
  2. A saved Exploration tracks assistant sources back to January.
  3. Outbound clicks to Operators, phone and booking links are key events.
  4. You know your top five AI landing pages, and each one is current.
  5. Search Console is linked and the Generative AI report is in your monthly routine.
  6. robots.txt lets in the assistants you want to be found by; our llms.txt explainer lists them.

For what AI-referred Visitors are looking for when they arrive, read When AI books the hotel.

Where Roam fits

Every Roam site comes with a custom Looker Studio report, and AI Discovery is live on every site at no extra cost, so assistants that fetch your pages get clean, structured markdown. Your team can add the AI Assistant channel to that report in a few minutes, using the steps above. See how AI Discovery works.