Secondary Conversion Leakage

Google Ads splits reporting into two columns. Conversions includes only actions set to Primary in the relevant goal. All conversions includes everything, Primary and Secondary. A healthy account will see All conversions slightly higher than Conversions (because Secondary actions like add-to-cart or page-view contribute real volume), but typically within 1.2 to 1.5x of the Primary count. When the ratio is 2x or higher, two things commonly explain it. First, an action that should be Primary was demoted to Secondary by mistake (or never promoted), so the same Purchase event is showing up only in All conversions. Bidding can not see it. Second, there are duplicate tags or imports such that a Purchase is counted once as Primary and once as Secondary under a different name, inflating All conversions without affecting bidding. The practical impact: reported Conversion Value per Cost (the ROAS proxy) calculates from Conversions, but operators reading All conversions for "actual outcomes" will see a much larger number. Disagreements between media buyer dashboards and finance dashboards usually trace back here.

1. Open the Conversions report and add the All conversions and Conversions columns side by side for each action.
2. For the flagged actions, check the Conversion goal action setting (Primary vs Secondary). If a macro outcome is set to Secondary, promote it to Primary.
3. If both Primary and Secondary actions cover the same outcome, identify the duplicate and remove or rename it.
4. After correction, expect the All conversions to Conversions ratio to fall to under 1.5x for most actions.
5. Document the rationale for any action intentionally kept at a high ratio (for instance, an action that legitimately receives both website-tag and offline-upload volume where one is Primary and the other is Secondary by design).