What are UTM parameters?
UTM parameters are short text tags added to the end of a URL that tell analytics tools where a visit came from. They identify the source, medium, and campaign behind a click, so you can compare how each link performs.
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Common UTM parameters
Common parameters include utm_source for the traffic source, utm_medium for the channel type, utm_campaign for its name, utm_term for paid keywords, and utm_content for distinguishing links. GA4 also supports utm_id for campaign IDs and utm_source_platform for the platform managing the activity.
A tagged link looks like your normal URL followed by a question mark and these pairs joined by ampersands.
Why naming rules matter
Analytics treats capital letters and spelling differences as separate values. If one person writes Email and another writes email, your reports split the same channel in two.
Agree on a naming guide and keep a shared log of tagged links.
Common mistakes
Don't tag links that point to other pages on your own site, since that can overwrite the original source of a visit. Avoid personal details in UTM values, and don't rely on them for platforms that tag clicks automatically unless you've checked how they interact.
Common questions
What does UTM stand for?
UTM stands for Urchin Tracking Module. Urchin was the analytics company Google bought and turned into Google Analytics.
Which UTM parameters are required?
Requirements depend on the tool and workflow. Google recommends consistent source, medium, and campaign tagging for manually tagged campaigns. Campaign data-import workflows also require matching campaign identifiers such as utm_id; check the requirements of the report or import you are using.
Do UTM parameters affect SEO?
They can create URL variations. A canonical tag pointing to the clean URL helps search engines treat them as the same page.
How do I build a UTM link?
Add the parameters to your URL by hand or with a URL builder, using your naming guide. Then click the link and confirm it appears correctly in your analytics.
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