If you take a spreadsheet and add up all the conversions claimed by Meta, Google, TikTok, and your email marketing platform, the total will almost certainly exceed your actual backend sales by 30-50%. This phenomenon is attribution inflation.
The Walled Garden Problem
Ad networks grade their own homework. They have an inherent financial incentive to claim credit for as many conversions as possible. If a user sees a TikTok ad on Monday, clicks a Google search ad on Wednesday, and checks out via a promotional email on Friday, all three platforms claim a 100% conversion in their dashboards.
If your analytics stack simply aggregates these platform-reported numbers without a deduplication layer, you are flying blind. Your blended CPA will look fantastic, while your CFO wonders where all the money went.
Building a Single Source of Truth
This is exactly why signal engineering and server-side tracking are critical. You need an independent, objective source of truth—whether that is a Mobile Measurement Partner (MMP) or your own internal data warehouse—to deduplicate these overlapping claims based on strict rules.
More importantly, you need to establish incrementality. Just because a platform drove a click doesn't mean it drove the sale. Did that retargeting ad actually convince the user, or were they going to buy anyway?
Aligning with Finance
Never optimize your overall budget based on platform-reported ROAS without calibrating it against your actual cash flow. This requires a shift in mindset, a concept deeply related to looking beyond basic metrics. Unify your marketing data with your financial data, or remain forever disconnected from reality.