How to Fix Google Ads Smart Bidding Using a Primary vs. Secondary Conversion Framework
By
Sarah Stemen
Pulled from the oven just right. Trustworthy, fact-dense, deeply satisfying.
Summary
Many Google Ads accounts suffer from a conversion tracking problem disguised as a strategy problem. The article explains how labeling every user action (form fills, clicks, page views, cart adds, etc.) as a "conversion" with equal weight pollutes the primary conversion pool, causing Google's Smart Bidding to optimize toward vague "engagement" rather than meaningful business outcomes. The author advocates for a Primary vs. Secondary Conversion Framework, where primary conversions (e.g., purchases, qualified leads) drive Smart Bidding optimization, while secondary conversions (e.g., newsletter signups, cart adds) are tracked for insights only. The article provides a step-by-step audit process to fix conversion architecture before testing new bid strategies.
Key quotes
· 5 pulledMany Google Ads accounts have a conversion tracking problem that is disguised as a strategy problem.
This less-than-ideal conversion setup is training Google's Smart Bidding to optimize toward a vague composite of 'engagement' instead of what matters for the advertiser.
When accounts are set up like this, the outcome is unfortunately predictable.
A polluted primary pool is the most common cause of Smart Bidding drift.
Before testing another bid strategy, audit your conversion architecture.
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