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Channel grouping

Channel grouping organises traffic sources into marketing channels such as organic search, paid search, email and social.

Written by Reflective Data experts · updated Oct 5, 2026

GA4 applies a default channel group using rules on source and medium, which depends on consistent UTM tagging. You can also create custom channel groups to reflect how your team thinks about marketing.

Messy source and medium values lead to messy channels, so fix tagging first.

related

Direct trafficReferral trafficUTM parameters

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