What eCommerce brands get wrong about retail media measurement

The article highlights a critical issue in retail media measurement: network-reported ROAS varies by up to 63% across platforms due to methodological differences like attribution windows and conversion definitions. This creates a "fragmentation tax" for brands working with multiple networks, as each network's data is irreconcilable. The problem isn't flawed data but that closed-loop measurement is designed for network-specific reporting, not cross-channel decision-making.

Brands scaling budgets across networks without independent measurement make portfolio decisions on unreliable data. Independent measurement provides a unified layer where the same attribution logic applies across all networks, turning network reports into inputs rather than verdicts. This enables accurate cross-network comparisons and budget allocation.

The necessary signal infrastructure already exists from mobile performance marketing, which solved similar governance challenges. However, recent acquisitions (Publicis acquiring LiveRamp, WPP taking over InfoSum) introduce conflict-of-interest risks in measurement. For ad ops decision-makers, the key takeaway is to invest in independent measurement to reconcile retail media data and make portfolio-level decisions with confidence.