How are you handling Google and Meta both claiming credit for the same conversion?

you gotta look at the attribution windows. if you still have 1-day view turned on for meta, it's just stealing credit for google search conversions. turn off view-through attribution and stick to 7-day or 1-day click on meta, then watch the overlap shrink. also, throw a simple post-purchase survey on shopify. when customers actually tell you they came from meta but google claimed the data-driven click, it gives you the real picture to show the client.
 
hi i think this is normal you would suggest you to use shopify as the main source because google and meta can count the same sale so use ga4 and also tests to compare them.
 
I usually explain that each platform reports based on its own attribution, so the numbers will overlap. Shopify should be the main source for total sales, then use platform data more for channel trends.
 
The Google and Meta can both claim the same purchase so their conversion numbers will overlap and i would also suggest you to use Shopify as the source of truth and check UTMs and customer journeys to understand the real channel contribution.
 
Running both Google Ads and Meta Ads for a client. Total reported conversions: Google says 140 for the month, Meta says 95. Backend (Shopify) shows 160 actual orders.

So the platforms are claiming 235 combined conversions for 160 actual purchases. That's a 47% inflation. Both platforms are using their own attribution windows and both are claiming assists that don't exist.

I know this is a known problem. But the client is asking why the "total ROAS" across both platforms looks so much better than the actual business results.

How do you explain this to clients without making it sound like the platforms are lying (even though kind of they are)? And what's your method for actually evaluating true channel contribution when both channels are running simultaneously?

Currently using the blended approach (total revenue / total spend) but it doesn't give channel-level insight.
I usually tell clients both platforms can claim the same sale, so dont add their conversions together. Use Shopify revenue as the real number and use channel attribution only for comparing performance.
 
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