The primary obstacle to scaling in-store media isn't a lack of measurement technology, but a fundamental disagreement between brands, retailers, and agencies on what success looks like. Different teams use separate scorecards and KPIs, creating friction and preventing a unified investment strategy.
The expectation of one-to-one attribution, conditioned by digital metrics like ROAS, is ill-suited for the complex, "messy" physical store environment. This approach oversimplifies shopper behavior and ignores numerous contributing factors like price, placement, and promotion, leading to flawed analysis.
The Shopper Purchase Rate (SPR) is not another metric to track. It's a framework for having a productive conversation by aggregating existing data from disparate scorecards (merchandising, RMN, etc.). It creates a "through line" to total units moved, providing a holistic view without reinventing measurement.
When viewed through a holistic lens that includes all in-store sales, digital screens and audio frequently show a higher return than online ads. This is because the vast majority of retail revenue still occurs in the physical store, so by ratio, investments targeting that environment naturally deliver superior performance on a dollar-for-dollar basis.
Retail Media Networks are competing against digital-only giants like Amazon but aren't fully leveraging their key differentiator: the physical store. By failing to introduce measurement frameworks that capture the immense value and sales volume of their brick-and-mortar locations, they suppress their own valuation and growth potential.
The retail media industry has moved past its initial "exuberant growth phase" into a more mature, operationally-focused stage. Future success hinges not on simply adding more networks, but on achieving tighter integration between media teams, merchants, and the core retail business to drive efficiency and alignment.