UTM tags are URL labels that help analytics tools identify where a visit came from and which campaign details accompanied it. Search Engine Journal reported on October 2, 2026, that Gemini is adding UTM parameters to some outbound links for referral attribution. Google’s Analytics documentation explains how GA4 handles UTM values, but does not confirm Gemini’s reported behavior or specify its tag values or coverage. That means a tagged visit may be easier to recognize; it does not mean GA4 can count every visit influenced by Gemini.
What UTM tags mean
UTM parameters are fields in a URL’s query string that pass source, medium, campaign, and related marketing information to an analytics system. In GA4, supported parameters populate manual traffic-source dimensions. For example, utm_source provides the manual source, utm_medium the manual medium, utm_campaign the manual campaign name, utm_term the manual term, and utm_content the manual ad content. Google’s traffic-source dimensions guide and its manual-tagging documentation describe these mappings.
As an Amazon Associate I earn from qualifying purchases.
For example, if a visitor follows a link with a source value identifying Gemini and that parameter reaches a page where GA4 collects data, the visit may appear under the corresponding manual source or session-acquisition dimension. The label tells you what the URL supplied; it does not establish why Gemini selected the page, whether a person saw a citation, or whether all Gemini visits use the same label.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →What is known about Gemini’s UTM tags
Search Engine Journal reported on October 2, 2026, that Gemini is adding UTM parameters to outbound links for referral attribution. If a tag survives the click and GA4 collects it, it may make that visit easier to identify.
#1 Best Overall
This is a secondary report, not a confirmed Google specification. The Google Analytics documentation cited here does not confirm Gemini’s outbound-link behavior, publish an exact Gemini UTM string, or say which Gemini surfaces, link types, devices, users, or regions receive tags. The available reporting also does not establish an independently verified Google rollout date, a percentage of Gemini visits tagged, or a guarantee that every outbound link is tagged. Look at the values actually arriving in your property rather than assuming a particular Gemini source or medium.
Where to find UTM data in GA4
Use traffic-source dimensions that match the question you are investigating. GA4 separates acquisition for a user’s first visit from acquisition for an individual session. Google’s scope guide explains the distinction: first-user dimensions describe where a user was first acquired, while session dimensions describe traffic acquisition for a session. For an incoming click, session source and medium are generally the relevant view; a user’s first-user source and medium answer a different question.
Google says manually tagged values appear as dimensions and dimension values in Analytics reports and explorations. It recommends consistent use of relevant UTM parameters, particularly source, medium, campaign, ID, and source platform; missing values can appear as “(not set).” Google’s example, utm_source=google, utm_medium=cpc, and utm_campaign=summersale, illustrates manual campaign tagging; it is not a documented Gemini tag.
How to check for Gemini-tagged sessions
- In GA4, open the report or exploration you use for acquisition analysis and select session-scoped source and medium dimensions to examine incoming sessions.
- Inspect the source and medium values recorded in your property. Do not assume a specific Gemini value; the official documentation cited here does not define one.
- For links your organization creates, keep UTM naming consistent and include the relevant source, medium, and campaign values. Google’s manual-tagging guide explains parameter handling.
- If expected values are absent, check whether redirects or URL shorteners removed query parameters, and consider whether the referral information was lost before the visit reached your site.
- Report the result as tagged or identified Gemini visits, not as a complete count of Gemini-originated sessions or total Gemini influence.
Why some visits still appear as direct or “(none)”
GA4 uses (direct) / (none) when it lacks clear referral information. Google lists missing UTM parameters, redirects that strip them, URL shorteners that remove referral details, visits through offline documents, direct URL entry, and ad blockers among possible contributors. See Google’s explanation of direct traffic.
Consequently, a rise in a Gemini-labeled source or a fall in direct traffic is not a census of AI-assisted visits. UTM values describe information delivered in the URL; they cannot reveal visits that arrive without those values or prove that every referral survived intact.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.UTM tags and auto-tagging are different
UTM parameters are manual labels embedded in a URL. GA4 also supports advertising-platform auto-tagging, which is a separate way to supply traffic-source information. Google documents both manual tagging and auto-tagging, but the Gemini report described here does not establish that Gemini’s reported outbound tags work like an advertising platform’s auto-tagging. Treat observed UTM fields as the values received by GA4, not as evidence about how Gemini chose or recorded a link.
Quick Recap
Best Value
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Free tools Windows power users keep installed
One-click scans. No signup required.
