UTM parameter

A UTM parameter is a URL label supplying manually assigned campaign context to analytics measurement. In GA4, utm_source, utm_medium and utm_campaign populate manual source, medium and campaign fields respectively, while utm_content can distinguish ad content.[1] The label describes origin as encoded by the sender, not automatically the interaction's actual contribution to a purchase.

A store could distinguish newsletter links from paid-partnership links if its measurement system processes those labels. Agree on a consistent naming convention and check the destination before launching a campaign. Keep personal information out of campaign labels and distinguish internal navigation from external acquisition. UTM labels assist classification, but do not solve missing consent, broken journeys or the question of whether advertising causes additional sales.