Measurement & Tracking
Conversion Action
A conversion action is a defined event in Google Ads (purchase, form submission, call, sign-up) that the account counts as a valuable outcome and that Smart Bidding optimizes toward when set as primary.
In practice
Everything in a Google Ads account flows from the conversion actions. They decide what the reports count, what the algorithm chases, and what a target CPA or ROAS is measured against. Each action has a source (website tag, Google Analytics, calls, imports), a counting method (one per click or every), a conversion window, an optional value, and a primary or secondary designation.
Primary actions feed bidding; secondary actions are observed only. The most common configuration errors we find are page-view events set as primary, both a GA4 purchase and a Google Ads purchase tag counted as primary (double counting), and calls under a meaningful duration counted alongside real inquiries.
Before launching or taking over an account we define the conversion set on paper: which events matter, what each is worth, and which are primary. Then we test every one with a real submission. Custom conversion goals let a campaign optimize toward a subset of actions when the account mixes lead types.
Why it matters
It is the definition of success the entire account optimizes toward; get it wrong and every other metric lies.
RELATED TERMS
Smart Bidding
Smart Bidding is Google's set of automated, conversion-based bid strategies (Target CPA, Target ROAS, Maximize Conversions, Maximize Conversion Value) that set auction-time bids using machine learning signals.
Offline Conversion Import
Offline conversion import uploads events that happen after the click, such as qualified leads, booked appointments, or closed deals, back into Google Ads or Meta, matched to the original click so bidding can optimize toward them.
Google Tag Manager (GTM)
Google Tag Manager is a free tag management system that deploys and controls marketing and analytics tags on a website from a single container without editing site code for each change.
Written by Ilya Bulychev, Founder, Live PPC Ads. Part of the PPC Glossary.
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