What are UTM parameters?
Nicklas Segatz Mortensen · Growth Hacker · Fractional CMO · Meta Ads Nerd · 8 July 2026 · 3 min.
Definition
UTM parameters are small tags you add to the end of a link (source, medium, campaign and more), so analytics tools can record which source, channel and campaign a visitor came from.
Also called: UTM parameters, UTM tags, UTM codes
Sådan virker det
UTM-parametre er tags, du føjer til links (source, medium, campaign), så din analyse kan se, hvor trafik og salg kom fra. Uden dem drukner en del trafik i “direct / ukendt”. Konsekvent UTM-mærkning er grundlaget for at tilskrive resultater til den rigtige indsats.
01The foundation for attributing results
Without UTM tagging, your analytics often don't know where a visitor came from — and the traffic drowns in “direct” or “unknown.” UTM parameters solve that by tagging each link with source (like newsletter), medium (like email) and campaign, so you can see exactly which effort drove visits and sales.
The value depends on discipline: a consistent naming convention across channels is the difference between usable data and a messy tangle. Set up right, UTMs are the foundation for honest channel reporting — but remember they tell you about source, not about incrementality.
Frequently asked questions
What are UTM parameters used for?+
To track which source, channel and campaign a visitor came from, so traffic and sales can be attributed to the right effort in your analytics. Without them, a lot of traffic ends up in 'direct / unknown'.
Do UTM parameters tell you about incrementality?+
No. They tell you where the traffic came from, not whether the sale would have happened anyway. For that question you need MER and incrementality tests — UTMs are for source tracking, not for measuring real added effect.
Related terms
Glossary
What is GA4?
GA4 (Google Analytics 4) is Google's analytics platform where all measurement is built around events rather than page views, and where web and app can be measured in a single property.
Read the entry →Glossary
What is attribution?
Attribution is the method that distributes the credit for a conversion across the touchpoints the customer met along the way. The model decides which channel gets the credit — and therefore where budget flows.
Read the entry →Glossary
What is first-party data?
First-party data is data you collect directly from your own customers and channels — purchases, website behavior, email engagement, contact details — and which you own and control.
Read the entry →
Nicklas Segatz Mortensen
Growth Hacker · Fractional CMO · Meta Ads Nerd at Oaksmond
Growth hacker and fractional CMO with 10+ years' experience and hundreds of millions in managed ad spend behind him. Background from larger Danish and international scale-ups, and from the agency world.
Meet the team →