Digital marketing glossary

What are UTM parameters?

Written and reviewed by L.K. Monu Borkala · Updated 7 November 2026

Definition

UTM parameters are short tags added to the end of a link that tell analytics tools such as Google Analytics 4 exactly where a visit came from. The main ones are utm_source, utm_medium and utm_campaign. They let you compare traffic from an Instagram bio, a WhatsApp broadcast or an email properly instead of guessing.

How it works

A tagged link looks like this: yoursite.com/offer?utm_source=instagram&utm_medium=social&utm_campaign=diwali_sale. When someone clicks it, GA4 reads the tags and records the session under that source, medium and campaign. Two optional tags, utm_term and utm_content, can record a keyword or tell apart two links in the same campaign. You can build links with Google's Campaign URL Builder or a simple spreadsheet. Google Ads tracks itself through auto-tagging, so UTMs matter most for social posts, WhatsApp, email, QR codes and influencer links, which might otherwise show up as direct or referral traffic.

Example

Say a boutique in Lucknow promotes a ₹1,499 chikankari kurta sale in three places: an Instagram story, a WhatsApp broadcast and a QR code printed on shopping bags. Each gets its own link, such as one ending in utm_source=whatsapp&utm_medium=broadcast&utm_campaign=chikan_sale. In GA4's traffic acquisition report, the owner sees that WhatsApp brought the most orders, while the QR code brought fewer visits but a higher share of buyers. Next time, she knows where to put her effort.

An illustration: the business and the rupee figures are made up to show how the idea works.

Common mistake

Using inconsistent spelling. GA4 treats 'Instagram', 'instagram' and 'IG' as three different sources, which splits your data. Pick a lowercase naming rule and keep a shared sheet of your links. Another mistake is adding UTMs to links between pages of your own website, which overwrites the real source of the visit.