Many of today’s most successful omnichannel brands still struggle to understand media’s true impact on in-store sales. It’s one of the biggest challenges retail marketers face. You’re investing across channels — digital, offline, out-of-home, direct mail — but where exactly is your ad spend moving the needle?
In today’s privacy-first world, granular user data is harder to come by, and most measurement models rely on correlation instead of proven impact. That makes understanding cross-channel performance especially tough, particularly when bridging the gap between digital ads and brick-and-mortar results.
But there’s a better way.
Using incrementality-based geo testing, Measured has uncovered new patterns in how digital media influences retail outcomes, and we’ve got the latest insights to prove it. Based on geo tests run over the last three months across leading omnichannel brands, here’s what marketers need to know to rethink their retail media strategy with clarity and confidence.
Why Incrementality Matters for Omnichannel Brands
For omnichannel marketers, knowing what's really working is harder than ever. Traditional attribution models weren’t built for today’s complex customer journey, and they leave major blind spots.
Here’s what often goes wrong:
- Click-heavy channels like paid search get over-credited, simply because they’re easier to track.
- Cross-channel halo effects go unnoticed, like when a YouTube campaign lifts in-store sales but gets no credit.
- Upper-funnel platforms like TV, Meta, and TikTok, which drive long-term growth, often appear to underperform due to lack of last-touch clicks.
This is where incrementality measurement changes the game. By using geo testing and cross-channel Media Mix Modeling (MMM), marketers can finally get a clear, unbiased view of what actually drives net-new revenue, across both digital and brick-and-mortar channels.
It’s not just more accurate. It’s essential for making smarter, more confident investment decisions in an omnichannel world.
Rethinking Meta: How This Retail Brand Turned a “Hold” Into a Confident Scale Decision
For most omnichannel giants, digital media is expected to drive more than just online orders; it’s also a key lever for in-store performance. But for too long, traditional measurement tools have left retailers in the dark when it comes to understanding how digital ads influence brick-and-mortar sales.
A major footwear retailer partnered with Measured to conduct a Meta platform holdout test. Initially, Meta’s performance looked underwhelming, especially when judged solely on online metrics. But when in-store sales were brought into focus, the story changed dramatically.
The Omnichannel Reveal:
- Online: Meta drove 3.73% of online orders, with a $2.83 iROAS, below the brand’s internal efficiency threshold.
- Retail: But offline, Meta delivered 4.97% of in-store purchases and a standout $16.33 iROAS, more than 4.5x the online return.
That shift in perspective was critical. When combining both online and offline results, Meta’s overall contribution not only met expectations, it surpassed them. A channel that was on track to be paused suddenly became one worth scaling up.
The Takeaway:
The brand’s test results prove the power of true omnichannel measurement. Without visibility into Meta’s offline impact, they would have underinvested in a high-performing channel, losing out on millions in incremental revenue. Thanks to incrementality-driven holdout testing, this retail brand was able to move from uncertainty to action, backing their decision to scale Meta with proof, not assumptions.
Discovering the Hidden Power of Pinterest: In-Store Sales
For a premium home furnishing brand, Pinterest has always been a visually rich channel with strong brand alignment. But until recently, its performance was judged primarily by online conversions — an incomplete view that risked undervaluing its true impact.
In partnership with Measured, this brand ran a Pinterest Holdout Test. The goal: understand not just Pinterest’s role in ecommerce, but its full contribution to revenue, including what it was delivering to in-store sales.
What the Data Showed:
- Online: Pinterest drove 4.16% of online orders, resulting in a $3.62 iROAS — solid performance for a platform often considered upper-funnel.
- Retail: But the real breakthrough came offline. Pinterest also drove 2.98% of retail sales, which meant the retail revenue it generated was more than 4x greater than the online sales.
If the brand had looked only at online results, they might have missed one of Pinterest’s most significant contributions: its ability to inspire and influence high-value retail shoppers, especially in a category where in-person purchases still dominate.
The Takeaway:
Pinterest wasn’t just driving clicks, it was driving foot traffic and furniture sales. For this home furnishings brand, this test reinforced a powerful truth: when you're an omnichannel brand, your best-performing channels aren't always the most obvious ones, and their impact often shows up where you're not looking.
Thanks to incrementality-based holdout testing, the brand now has the clarity to optimize Pinterest not just as a digital channel, but as a high-performing part of its total media mix.
What Marketers Need to Remember
Today’s retail marketers face a tough reality: they're being asked to justify every dollar of media spend without the tools to clearly see what’s working, especially when it comes to connecting digital investment to in-store impact.
Traditional attribution systems rely on clicks, not outcomes, and they miss the subtle but critical influence of upper-funnel and cross-channel media. As a result, brands often misjudge the effectiveness of platforms like Meta and Pinterest, undervaluing them based on incomplete online data.
The benchmark studies from these two leading omnichannel brands reveal a different story. Through incrementality-based holdout testing, these brands uncovered the real impact of their upper-funnel efforts.
Meta, previously on the chopping block, turned out to be a retail powerhouse, driving over 4.5x more value in-store than online. Similarly, Pinterest, long viewed as a branding tool, delivered stronger incremental lift in physical sales than its digital performance alone ever suggested.
The takeaway is clear: To make smart media decisions in an omnichannel world, brands must move beyond assumptions and correlation. Incrementality measurement through geo testing and MMM offers the clarity marketers need to uncover hidden value, cut wasted spend, and scale high-performing channels with confidence.
When you can see the full picture, online and in-store, you stop second-guessing, and start growing. If you’re ready to take your media measurement and optimization practice to the next level, get in touch with a Measured expert today.