Closing the Gap Between Digital Media, In-Store Sales
One of the biggest challenges brands face is that consumer behavior is omnichannel, yet measurement still tends to be channel-specific.
The challenge isn’t a lack of sales — it's a lack of visibility.
Measurement has historically been anchored in e-commerce, while actual shopper behavior moves fluidly between digital and physical environments. That disconnect creates a blind spot in how performance is evaluated and how media is optimized.
A consumer may be exposed to an ad on a retailer's site, retargeted off-site and ultimately make a purchase in a physical store. Yet many brands are still evaluating success based primarily on e-commerce results.
As retail media expands beyond on-site placements into off-site channels that drive consideration across a longer, less linear path to purchase, that gap becomes even more pronounced.
The issue isn’t whether digital media influences in-store sales — it does. The issue is whether brands have the infrastructure to connect that exposure to the purchase and optimize against the full outcome.
When in-store sales are left out of measurement, media impact is underestimated, high-value audiences can be misidentified and optimization decisions are made against an incomplete picture of performance.
Closing that gap requires more than incremental reporting improvements. It requires the ability to align audience activation, media execution and measurement across both online and in-store behavior — incorporating real-time purchase event capture — so attribution catches up to how consumers actually shop.
Building the Infrastructure
This requires rethinking how media, data and attribution are connected from the start.
Most demand-side platforms (DSPs) weren't built for this. They were architected for open-web programmatic buying, optimizing against digital signals with no native connection to in-store transaction data.
Connecting media exposure to a physical store purchase requires durable identity resolution across loyalty data, POS records and digital identifiers. Most platforms simply weren't designed to do that.
Retailers have a structural advantage: First-party visibility into both digital behavior and in-store transactions that no third-party source can replicate. But that data needs to be activated within the same environment where media is planned and optimized — not siloed in a reporting layer where programmatic campaigns can’t continuously learn and optimize against it.
That's where a DSP built with composable, retail-native architecture makes the difference — activating first-party data at scale, optimizing in-flight and connecting media exposure to outcomes across both channels.
Proof in Practice
This approach is already delivering measurable results. At Walmart Connect Mexico, whose DSP is powered by Infillion's white-labeled MediaMath technology, these capabilities help brands activate first-party data and measure performance across both online and in-store sales.
One example is from a campaign with Beiersdorf's Nivea, which had been running always-on off-site display campaigns through Walmart Connect Mexico.
The campaign leveraged Walmart's first-party data to reach high-intent beauty and personal care shoppers. Initially, campaign performance was measured solely against e-commerce transactions.
As Walmart Connect Mexico introduced enhanced omnichannel audience targeting and attribution capabilities — enabled through Infillion's composable architecture — the brand was able to expand both targeting and measurement to include in-store (POS) purchases. This provided a more complete view of how digital media influenced total sales across channels.
With in-store attribution incorporated, Nivea saw ROAS increase by more than 80%. This improvement was driven by the ability to connect digital media exposure to in-store purchases and optimize toward audiences with demonstrated online and off-line buying behavior.
Tracking online conversions within a closed environment is no longer enough in a world where shopper journeys span digital and physical channels.
The next phase of growth will be defined by those who can connect media to total sales rather than solely online outcomes.
About the Author
Liz Weinsten is the VP of marketing at Infillion, bringing more than 15 years of experience across ad tech and digital media. She leads go-to-market strategy for enterprise solutions, with a focus on retail and commerce media.
