Amazon Ads told advertisers on July 07, 2026 that Omnichannel Metrics, the tool measuring how Amazon DSP campaigns influence purchases beyond Amazon's own store, now identifies the individual retailers where those purchases occur. The change turns a previously undifferentiated "offline" number into a store-by-store breakdown of units and sales.

The update is narrow in scope and specific in effect. Omnichannel Metrics, referred to internally as OCM, already told United States advertisers that their display, audio, and video campaigns on Amazon DSP were driving sales somewhere outside Amazon.com. What it could not tell them was where. According to Amazon, the tool now surfaces retailer-level units and sales at both the study level and the campaign level, so an advertiser running a national display campaign can see which named stores captured the resulting purchases.

That distinction matters to any brand that sells through more than one retail partner. A consumer electronics manufacturer whose products sit on the shelves of several national chains previously saw one aggregate figure for beyond-Amazon sales. The manufacturer could confirm that its Amazon DSP investment moved product in physical retail, but not whether it moved that product at one chain or another. Retailer-level breakouts connect campaign performance to individual trade relationships rather than treating the entire physical retail channel as a single line item.

What Amazon actually shipped

The mechanics rest on two ingredients Amazon has described consistently across the product's history. The first is the Amazon Shopper Panel, a rewards-based mobile application that Amazon launched in the United States in October 2020. Panelists upload receipts from purchases made outside Amazon.com and complete short surveys, earning a monthly reward for participation. The second is a set of third-party signals that Amazon combines with the panel data. Together they let Amazon match advertising exposure against purchases that never touched its own checkout.

The attribution model underpinning the feature is exposure-based, not click-based, a difference that shapes what the numbers mean. Click-based measurement credits a sale only when a shopper clicks an ad and then converts. Exposure-based attribution asks a different question: did a shopper who was shown an Amazon DSP ad go on to buy, regardless of whether a click ever happened and regardless of how much time passed in between. According to Amazon, the retailer breakouts are grounded in exposure-based attribution, reflecting where ad-exposed shoppers actually purchased.

The reason that methodology choice is not a technicality comes down to the formats Amazon DSP sells. Display, audio, and video placements build awareness over days or weeks rather than provoking an immediate click. A shopper who sees a display ad for a coffee maker on a Tuesday and buys that coffee maker at a home goods chain the following weekend generates no click to attribute. A click-based system records nothing. Exposure-based attribution is the only approach that captures that shopper's path at all, which is why it sits at the center of a tool designed to measure offline outcomes.

Availability is deliberately restricted. According to the announcement, the retailer-level breakouts are available in North America, specifically the United States, and nowhere else. Both Amazon DSP Self-Service and Amazon DSP Managed Service advertisers can use the feature, and it is accessed through the Amazon DSP console. Amazon did not name the specific retail partners whose sales data flows through Omnichannel Metrics, and it did not publish figures on measurement accuracy or sample size for any individual retailer.

Why retailer-level detail changes the reporting

For brands that operate both an e-commerce presence and brick-and-mortar distribution, the gap this addresses has been persistent. Digital-only attribution captures the slice of sales that happen on a screen and misses the rest. The scale of that miss is not trivial. According to Forrester research cited in Amazon documentation, 72% of United States retail sales still occur in physical stores. For many advertisers, digital-only measurement therefore overlooks the majority of the purchase funnel.

Retailer-level breakouts give large, multi-retailer advertisers a way to tie campaign spend to specific commercial relationships. A brand negotiating shelf space or promotional support with a national chain can now point to Amazon DSP performance data associated with that chain rather than to a market-wide average. Whether that added precision reshapes actual budget decisions is a separate question, and one the announcement does not settle. It depends on how consistently the retailer breakouts hold up across different product categories and different advertiser scales, which only advertisers testing the feature over the coming months will establish.

There is a structural caveat worth stating plainly. Amazon's Shopper Panel accepts receipts from any retailer, which gives the panel theoretically universal coverage. In practice, measurement accuracy and sample size vary from one retailer to the next, shaped by how many panel members shop at a given chain and how often they buy in a given category. A store with heavy panel participation yields sturdier numbers than a store with thin participation. Amazon has not disclosed those participation rates, so advertisers cannot independently gauge the reliability of any single retailer's figures from the announcement alone.

A steady sequence, not a single leap

This release did not appear from nowhere. It is the latest increment in a measurement roadmap Amazon has been building out in visible stages, and reading it against that sequence clarifies what is genuinely new.

The category-level foundation came first. On November 04, 2025, Amazon expanded Omnichannel Metrics to five product categories - Consumer Electronics, Fashion, Home Goods and Furniture, Home Improvement, and Toys and Games - and automated the process of creating measurement studies. That expansion extended a tool that connects Amazon DSP campaign exposure to offline purchase activity across a wider set of verticals.

Then came the intermediate step. On April 14, 2026, Amazon introduced product category-level breakouts to Omnichannel Metrics, applying the same exposure-based methodology at the study and campaign level to show advertisers which product categories, rather than which specific stores, their campaigns were driving purchases within. That April release gave multi-category advertisers a way to validate omnichannel strategy against purchasing behavior instead of broad assumptions. The July 07 update follows the identical logic, moving one rung further down the ladder of granularity: from category to individual retailer.

The Amazon Shopper Panel that supplies the first-party data has its own lineage. When Amazon first launched the panel in the United States, it positioned the collected receipt and survey data as fuel for advertising measurement and retail insights, and the mechanics have stayed consistent since. Ten or more eligible receipts per month earned panelists a set monthly reward, and Amazon said it would aggregate and anonymize the information panelists chose to share. That panel put Amazon into direct competition with third-party consumer measurement firms, and it remains the backbone of the offline attribution Omnichannel Metrics now reports at the retailer level.

The broader measurement push around it

Retailer breakouts arrive amid a wider run of Amazon measurement releases, none of which directly modify Omnichannel Metrics but all of which describe the same direction of travel: fewer intermediaries, more self-service access, and finer granularity.

In November 2025, Amazon unified DSP and sponsored ads into a single Campaign Manager platform at its unBoxed conference, collapsing interfaces that previously forced advertisers to navigate separate systems. Days later, the company launched a unified reporting system across advertising products in open beta, consolidating data from sponsored ads and DSP campaigns through a single report builder. That reporting system exited beta into general availability on June 08, 2026, with Amazon setting a December 31, 2026 deadline to retire two legacy reporting pages.

The self-service theme runs through the same period. On May 15, 2026, Amazon opened self-service access to more than fifty third-party measurement products for Amazon DSP advertisers across eighteen countries, covering incrementality, brand lift, and offline sales impact studies. That launch let media teams start measurement studies on their own rather than routing every request through a managed-service intermediary. The retailer-level Omnichannel Metrics release fits the same pattern of pushing measurement capability directly into the hands of the buyers using the platform.

Attribution methodology itself shifted in the same window. On January 1, 2026, Amazon tightened view attribution and split its ROAS reporting, applying shopping-signal enhanced last-touch attribution to view-tracked campaigns across Sponsored Brands, Sponsored Display, and Amazon DSP while keeping legacy measurement accessible through separate "all views" metric families. Independent verification expanded too: Integral Ad Science earned Media Rating Council accreditation for third-party Amazon DSP measurement on November 13, 2025, the first time an independent provider received MRC certification for impression, viewability, and invalid traffic metrics within Amazon's ecosystem.

The attribution gap the industry keeps circling

Retailer-level measurement lands at a moment when the limits of single-retailer attribution have drawn fresh scrutiny. Research published by Incremental, a causal intelligence platform for retail media measurement, in June 2026 examined how much retail media impact escapes conventional attribution. The study, titled "The Cross-Retailer Halo Effect: What Siloed Attribution Misses," drew on data from more than 150,000 campaigns and 350 million dollars in ad spend over a twelve-month period. According to Incremental, siloed last-touch attribution systematically understates the return on upper-funnel retail media channels, missing between 36% and 53% of true campaign impact overall, with the miss rate reaching as high as 80% for off-site video formats specifically.

That research addresses a different problem than the one Omnichannel Metrics solves, and the distinction is worth keeping straight. Incremental's work concerns cross-retailer halo effects, where an ad running on one retailer's platform drives sales at a competing retailer entirely outside the advertising retailer's own attribution system. Omnichannel Metrics, by contrast, measures purchases that follow exposure to Amazon DSP ads and reports where those purchases landed. The two examine different failure modes of retail media measurement, but they point at the same underlying reality: the standard closed-loop report captures only part of the picture, and the sums involved are large. According to Incremental, United States retail media ad spend is projected to reach roughly 70 billion dollars in 2026, growing at close to double the pace of the overall advertising market, with Amazon accounting for more than three-quarters of that total.

Set against that backdrop, the July 07 release reads as one more move to close the distance between what a campaign costs and what it demonstrably produced. It does not change the attribution method, expand the geography beyond the United States, or add new categories. What it adds is resolution: the ability to attach a beyond-Amazon sale to a named store rather than to an anonymous aggregate. For advertisers whose products move through a roster of retail partners, that resolution is the difference between knowing a campaign worked and knowing where it worked.

Timeline

Summary

Who: Amazon Ads, delivering the update to United States advertisers using Amazon DSP Self-Service and Amazon DSP Managed Service.

What: Omnichannel Metrics now breaks down beyond-Amazon offline sales and units by the specific retailer where they occurred, at both the study level and the campaign level, using exposure-based attribution built on the Amazon Shopper Panel and third-party signals.

When: Amazon published the announcement on July 07, 2026, building on category-level breakouts introduced on April 14, 2026 and the five-category expansion from November 04, 2025.

Where: The feature is available only in the United States, accessed through the Amazon DSP console.

Why: Advertisers with offline sales spanning multiple retail partners could previously confirm that Amazon DSP campaigns drove purchases beyond Amazon without knowing which specific retailers captured them; retailer-level detail ties campaign performance to individual trade relationships rather than to an undifferentiated "offline" figure, at a time when roughly 72% of United States retail sales still happen in physical stores.