Why Retailer-Level Measurement Changes DSP Strategy
Imagine your brand sells through:
Amazon,
Walmart,
specialty stores,
department stores,
and physical retail.
You run a $200,000 Amazon DSP campaign.
Amazon-attributed retail sales inside the Amazon store show:
$500,000.
The campaign appears to deliver:
2.5x Amazon ROAS.
But OCM discovers another:
$450,000 in off-Amazon sales
among exposed shoppers.
Suddenly the broader commercial picture becomes:
$950,000 measured omnichannel sales.
The media investment hasn't changed.
The understanding of its value has.
That can materially affect whether a brand:
- scales the campaign,
- pauses it,
- changes audiences,
- adjusts creative,
- reallocates budget.
A Real Amazon Case Study Shows How Big the Blind Spot Can Be
Amazon published an OCM case study involving Serta Simmons Bedding that illustrates the problem particularly well.
According to Amazon, Serta found that 62% of its display ad-driven sales occurred beyond Amazon, across retailers including Walmart, Sam's Club, Macy's and others.
When those beyond-Amazon sales were included, Amazon reports the campaign produced 2.2x higher Omnichannel Total ROAS than the picture visible from Amazon sales alone. Amazon Ads
That does not mean every brand will discover 62% of its impact outside Amazon.
It demonstrates why Amazon-only attribution can dramatically understate campaign value for heavily distributed brands.
Omnichannel Measurement Matters Most for Brands With Broad Distribution
OCM retailer breakouts become especially useful when the same products or brand are sold across many places.
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