What causes ‘sessions with no channel grouping’ in GA4 acquisition reports?

Google Analytics GA4 Hard

Google Analytics GA4 — Hard

What causes ‘sessions with no channel grouping’ in GA4 acquisition reports?

Key points

  • Sessions without channel grouping result from mismatched source/medium
  • Custom UTM parameters and non-standard mediums can cause this issue
  • Referrals from uncategorized sources are a common cause
  • Direct traffic not meeting the Direct channel definition can also lead to this

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