What's the real difference between the Conversions and All Conversions columns, and why does it matter?
The Conversions column contains only the actions marked as primary, and that is what smart bidding optimizes toward. All Conversions includes secondary actions used for reporting only. If a secondary action is accidentally marked primary, or the same lead is counted through two actions, the bidder optimizes toward an inflated number and quietly overpays for every real lead.
Primary and secondary is a bidding decision, not a reporting one
Marking an action primary is the same as telling the bid strategy that this event is what you want more of. Marking it secondary means you want to see it but not chase it. The naming makes it sound like an importance label. It is closer to a wiring diagram.
That is why the most expensive misconfiguration in a service account is usually not a bid — it is a page view, a click on a phone link, or a chat open left in the primary set alongside the real lead events.
The three ways one lead becomes several conversions
- Two paths, one person. Someone taps to call from the page and also submits a form. Two primary actions fire. One lead exists.
- Counting set to Every. A form action set to count every conversion turns a double submit or a back-button resubmit into two leads. Lead-generation actions should almost always count one per click.
- Overlapping events. A call from the website and a call from the ad extension can both record for the same conversation if the number swap and the extension are tracking in parallel.
A reconciliation you can run in ten minutes
Take a single week. Count primary conversions in the platform. Then count distinct new lead records in the CRM or field service system for that same week, restricted to the same source. The two will not be equal — lag and unmatched traffic guarantee that — but the ratio should be near one.
A ratio materially above one is double counting, and it means every target CPA you have set is denominated in a unit that does not exist. Running that comparison on a schedule rather than once is the point of wiring systems together instead of exporting spreadsheets.
What to do when you find it
Do not simply delete the extra action; you often still want it for reporting. Move it to secondary, leave the historical data intact, and expect the bid strategy to go through a genuine relearning period as its apparent conversion volume drops. Cost per conversion will appear to rise even though nothing about your business changed. Tell whoever reads the report that before it happens.
The version of this that survives audits is one where lead counts come from the operational system and the ad platform is used for what it genuinely owns, which is spend and auction data. That split of responsibility is the foundation of usable marketing reporting.
Topics: conversion tracking · smart bidding · double counting · measurement
Have a version of this question about your own business?
The useful answer usually depends on which systems you run and how they're connected. That's a conversation, not a blog post.