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Google Ads Conversion Tracking Explained: Setup, Types, and Common Mistakes

AdsWatch Blog Mai 2026 7 min de lecture

More than half of active Google Ads accounts have conversion tracking issues — duplicate conversions, missing tags, or misattributed goals. Here is how to get it right.

SOMMAIRE
  1. Types of Google Ads Conversions
  2. Setting Up Conversion Tracking
  3. Common Conversion Tracking Mistakes

Types of Google Ads Conversions

Google Ads can track several conversion types — choose based on your business goals:

1
Website actions: Form submissions, purchases, page views — tracked via Google tag or imported from GA4
2
Phone calls: Calls from ads via click-to-call or calls to a Google forwarding number on your site
3
App actions: App installs or in-app events — relevant for app advertisers
4
Import from CRM: Offline conversions imported from your CRM or sales system — highest-quality data

Setting Up Conversion Tracking

The recommended path in 2025 is Google Tag plus GA4 import:

1
Install Google Tag on your site or use Google Tag Manager
2
Configure GA4 key events for your most important actions such as form submit or purchase
3
In Google Ads link your GA4 property under Linked accounts
4
Import GA4 key events as Google Ads conversions
5
Test with Google Tag Assistant to confirm tags are firing correctly

Common Conversion Tracking Mistakes

These mistakes make your CPA and ROAS data unreliable:

1
Double-counting: Using both Google tag AND GA4 import for the same conversion counts it twice
2
Counting micro-conversions as primary: A page view as a primary conversion inflates numbers artificially
3
Wrong attribution model: Last-click misses the multi-touch contribution of upper-funnel keywords
4
Missing mobile conversions: Tag not firing on mobile due to layout shifts or single-page app structure
5
No offline conversion import: Not closing the loop between ad clicks and actual sales
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