What Is Default Channel Group?
A default channel group is a built-in analytics rule set that classifies traffic into channels like Email, Paid Search, Organic Social, and Referral.
Updated 2026-06-17
Quick Definition
A default channel group is a built-in analytics rule set that classifies traffic into channels like Email, Paid Search, Organic Social, and Referral.
Expanded explanation
Default channel groups help analytics platforms organize traffic based on rules that often use source, medium, and other campaign values.
Why it matters
Channel groups shape executive reporting and channel performance analysis. If source and medium values do not map cleanly, teams can misread campaign results or spend time explaining Unassigned traffic.
Common mistakes
- Assuming any custom medium will map to the intended GA4 channel.
- Using source and medium combinations that work for humans but do not match GA4 rules.
- Ignoring case-sensitive values that create separate report rows.
Examples
Practical example
In GA4, utm_source=google and utm_medium=cpc commonly maps to Paid Search, while utm_source=newsletter and utm_medium=email maps to Email.