Data Measured

artifact #A-009 · checklist · current

Source group and UTM audit checklist

The checks that keep channel reports honest through Google's dimension changes: the Google tag before custom events, one family of traffic-source dimensions per report, Source Group vs raw source, the primary channel group frozen and documented.

verified_on
2026-09-09
checked against
GA4 What's new (Jun 11 2026; May 13 2026; Jul 30 2026)GA4 What's new archive (Nov 13 2024; Mar 31 2025; Feb 28 2024; Feb 8 2024)
next re-check
2026-12-01
status
current
time
40 minutes
skill
Editor on the property

What's inside

  • 1 · Custom events fire after the Google tag config (required since 13 Nov 2024 — otherwise they are dropped)
  • 2 · One family per report: manual (session/user/event-scoped) or the legacy session source/medium, never mixed (Feb 2024)
  • 3 · Source Group where you want Facebook/Instagram/TikTok merged; raw source where you do not (Jun 2026)
  • 4 · '(data not available)' handled in filters and explanations (Mar 2025)
  • 5 · The 'ai-assistant' channel: remove or align your own AI-referrer rule (May 2026)
  • 6 · Primary Channel Group: rules documented, changed once, annotated, frozen (Feb 2024)
  • 7 · UTM templates at the ad platform match what the import joins on (Jul 2026 diagnostic)

Install

  1. Run the seven checks on one property; write the answers into the property's annotations.
  2. Repeat when the log records a change tagged to this artifact.

Breaks on

The logged changes that can invalidate this artifact. A new one triggers a re-check.

Stamped 9 Sept 2026 · re-checked quarterly or on change · corrections to team@datameasured.com · ← the library