Importing GA4 conversions into Google Ads is one of the most effective ways to improve the quality of data your smart bidding campaigns use. Instead of relying only on the Google Ads global site tag, you bring GA4’s more complete view of your customer journey into your bidding decisions.
This guide walks through the full setup process, common mistakes to avoid, and what to do before you make the switch.
Why Import GA4 Conversions Instead of Using the Google Ads Tag Alone?
The Google Ads conversion tag fires when a purchase happens on your thank you page. GA4 tracks more than just that — it tracks the full journey from first session to final purchase, deduplicates events, and supports cross-device attribution through User ID.
When you import GA4 conversions into Google Ads, your bidding algorithms see:
- Better attribution across sessions and devices
- Consistent data between GA4 and Google Ads reports
- Conversion values pulled from your actual GA4 purchase events
Many Shopify stores run both the Google Ads conversion tag and imported GA4 conversions simultaneously. This causes double-counting. You should pick one primary source and mark the other as secondary before you switch.
Step-by-Step: Import GA4 Conversions into Google Ads
Step 1: Link GA4 to Google Ads
Go to GA4 → Admin → Google Ads Links. Click Link and select your Google Ads account. Enable Personalized advertising and confirm Auto-tagging is on in your Google Ads account settings. Without auto-tagging, GA4 cannot attribute sessions back to Google Ads clicks, and the import will not work correctly.
Step 2: Mark the Right Events as Conversions in GA4
In GA4 → Admin → Conversions, make sure your purchase event is marked as a conversion. If it is not listed, click New conversion event and type purchase. Wait 24 hours for it to appear with data before moving to step 3.
Step 3: Import the Conversion in Google Ads
In Google Ads, go to Tools → Measurement → Conversions → New conversion action. Select Import, then choose Google Analytics 4 properties. You will see your linked GA4 property and a list of marked conversion events. Select purchase and click Import and continue.
Step 4: Configure the Conversion Settings
After importing, set the following:
- Category: Purchase / sale
- Value: Use the value from the GA4 event (variable, not fixed)
- Count: Every conversion (so multiple purchases per session count separately)
- Conversion window: 30 days is standard for most Shopify stores
- Attribution model: Data-driven if your account qualifies, otherwise Last click
Step 5: Mark Your Old Tag as Secondary
If you were previously using the Google Ads conversion tag on your Shopify thank you page, go to that conversion action in Google Ads and change its bidding status to Secondary action. This stops it from influencing smart bidding while still recording data for comparison.
How Long Does It Take for Data to Appear?
After importing, it takes 24–48 hours for conversion data to start flowing into Google Ads. Historical data is not imported — you will only see conversions from the date of import onwards.
Do not make this switch during a campaign’s learning phase. Any major change to conversion tracking resets learning. Wait until campaigns are stable, then switch, then allow 4–6 weeks for the new data to train the algorithm.
Common Issues After Importing GA4 Conversions
No conversions showing after 48 hours
Almost always caused by auto-tagging being disabled. Check Google Ads → Settings → Auto-tagging and confirm it is enabled. Also confirm the GA4 → Google Ads link is active (green status in GA4 Admin).
Conversion numbers are much lower than expected
Your GA4 is not capturing all purchase events. Before importing, make a test purchase and confirm the purchase event fires in GA4’s Realtime report with the correct value and item data.
Google Ads is showing more conversions than Shopify orders
You have duplicate tracking — both the Google Ads tag and imported GA4 conversion are set to primary. Mark one as secondary immediately.
Should Every Shopify Store Import GA4 Conversions?
Yes — but only after confirming GA4 is tracking accurately. If GA4 is missing 20% of your purchases, importing those conversions into Google Ads gives smart bidding worse data than your original Google Ads tag. Fix your tracking accuracy first, then make the switch.
Fix Your Tracking Before Importing
Importing GA4 conversions into Google Ads only improves your campaigns if the GA4 data underneath is accurate. Missing events, wrong revenue values, and duplicate purchases will all flow through into your bidding and cause smart bidding to make poor decisions.
We check your full GA4 and Google Ads conversion setup and confirm everything is accurate before you make the switch. Book your free Shopify tracking audit here.