The two ROAS, and why they differ
On the e-commerce case published on this site, Meta reports 2.83x and the brand's back office confirms 2.29x. The gap is not a mistake: Meta claims sales it watched happen without having caused them, and it does that for every advertiser.
Steering on the dashboard alone means steering on the flattering one of the two. This brand broke even at 1.64x: both measurements cleared it, so the decision to raise the budget held on either reading.
Where to look when it does not convert
The order in which I look at an account that is not performing is counter-intuitive for most advertisers, who start with targeting.
- →The offer: if organic traffic does not convert either, advertising will make the same refusal more expensive.
- →The funnel: speed, clarity of price, shipping announced late, checkout in three clicks or in eight.
- →The creative: the click-through rate, and the first three seconds.
- →The audience, rarely the root cause.
- →The settings, which amplify what works and repair nothing.
Tracking decides everything else
Since the tracking restrictions, a share of conversions no longer comes back through the browser. Your campaigns look like they are underperforming, and the algorithm learns on data full of holes.
The server-side Conversions API fixes a good part of it. This is not a comfort setting: it determines the quality of everything downstream.