Account-Wide Attribution Chaos
This account uses many different attribution models across its conversion actions. Last-Click, Position-Based, Data-Driven, Linear, Time-Decay. Without a discernible governance pattern. Account-level reports that mix these are not interpretable; campaign decisions made against the mixed signal are unreliable.
Why It Matters
A single account using multiple attribution models can be intentional (Data-Driven for the high-volume macro action, simpler models for low-volume diagnostics). But when more than three models appear with no apparent rationale, the account has accumulated attribution debt. Every team member added a model that made sense to them, none cleaned up. The downstream effects are real: campaign reports rolling up multiple actions blend their attribution logic, period-over-period comparisons are unreliable, and Smart Bidding learns from a signal whose model assumptions are inconsistent.
How To Fix It
- Audit each enabled Primary action and its current attribution model.
- Decide an account-level attribution philosophy: Data-Driven for all eligible actions, with a documented fallback (Position-Based or Linear) for actions that do not yet qualify.
- Update every action to either the chosen primary model or the documented fallback.
- Archive or document any actions that need a non-standard model with a written justification in the Description field.
- Add attribution-model auditing to the team's quarterly governance cycle.
Example
Current account models:
Purchase: Data-Driven
Lead: Last-Click
Demo Request: Position-Based
Sign-up: Linear
Phone Call: Time-Decay
Fix: standardise on Data-Driven, fall back to Position-Based for low-volume actions, document any exceptions.Google Ads accounts using multiple attribution models across conversion actions without a discernible governance pattern. Google's attribution documentation, mixed-model accounts produce incoherent portfolio-level reports and unreliable Smart Bidding signal. Fix: standardise on a single primary attribution model with a documented fallback, update each action, and add attribution to quarterly governance review. Source: support.google.com/google-ads/answer/6394265.
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References
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