What is Commerce Media?
Commerce media is the use of first-party purchase data and commerce-owned advertising inventory to deliver targeted ads across retailer websites, apps, and off-site channels. It sits at the intersection of retail and media, connecting brands to shoppers using actual transaction signals rather than inferred intent. As third-party cookies decline and retail media networks mature, commerce media has become one of the fastest-growing segments in digital advertising.
How Commerce Media Works
Retailers accumulate transaction data at a scale few publishers can match. Every product search, cart addition, and completed purchase creates a behavioral signal tied to a real buying decision. Commerce media monetizes that data by packaging it into targetable audiences and selling ad placements to brands, both on the retailer’s own properties and through programmatic off-site deals.
The basic model operates in three layers:
- On-site placements: Sponsored product listings, banner ads, and branded storefronts within the retailer’s own search results and category pages.
- Off-site extension: The retailer’s audience segments applied to programmatic inventory across the open web, connected TV, and social platforms.
- In-store digital: Digital screens, self-checkout ads, and QR-triggered promotions at physical retail locations.
Closed-loop measurement is the defining advantage. Because the retailer controls both the ad serving and the purchase data, it can attribute a sale directly to a specific ad impression, a capability traditional digital advertising has struggled to provide.
Key Players and Market Scale
Amazon dominates the sector. Amazon Advertising generated approximately $47 billion in revenue in 2023, making it the third-largest digital ad platform globally behind Alphabet and Meta. Its advantage is depth: product search intent, Prime membership data, and fulfillment history combine into one of the richest commerce data sets available.
Walmart Connect, the retail giant’s commerce media arm, reported 27% year-over-year ad revenue growth in Q4 2023. Kroger Precision Marketing, operated through a partnership with 84.51 (a data analytics subsidiary), applies loyalty card purchase data across 60 million households to CPG (consumer packaged goods) brand campaigns. Target’s Roundel network and Instacart Ads round out the top tier of U.S. commerce media operators.
Outside retail, financial institutions and travel platforms are building parallel commerce media networks. JPMorgan Chase launched Chase Media Solutions in 2024, using card transaction data to connect brands with verified buyers. This expansion beyond traditional retail is why the category is now labeled “commerce media” rather than simply retail media network.
Commerce Media vs. Traditional Digital Advertising
| Dimension | Commerce Media | Traditional Display/Search |
|---|---|---|
| Data source | First-party purchase transactions | Third-party cookies, browsing behavior |
| Audience signal | Verified buyers | Inferred intent |
| Attribution | Closed-loop (same ecosystem) | Multi-touch, cross-domain modeling |
| Placement context | Near point of purchase | Variable; often content-adjacent |
| Primary metric | ROAS, incremental sales lift | CPM, CPC, viewability |
Core Metrics and Measurement
Commerce media campaigns are evaluated primarily on Return on Ad Spend (ROAS) and incremental sales lift.
ROAS formula:
ROAS = Revenue Attributed to Ads / Ad Spend
A sponsored product campaign generating $80,000 in attributed sales on $10,000 in spend produces an 8x ROAS. Benchmarks vary by category: grocery CPG campaigns typically see 3x to 6x ROAS, while electronics and apparel can run higher due to larger average order values.
Incremental lift measurement goes a step further, isolating the sales driven by the ad versus what would have occurred organically. Retailers run holdout tests, showing the ad to a treatment group and withholding it from a control group, then comparing purchase rates. Only the delta counts as truly incremental.
Incremental ROAS formula:
iROAS = Incremental Revenue / Ad Spend
Brands increasingly demand iROAS over standard ROAS because headline ROAS figures often include organic sales that would have happened regardless of the ad.
The Role of First-Party Data
Commerce media’s durability rests on first-party data, information collected directly from a retailer’s own customers. Unlike third-party data sourced from brokers, first-party purchase data is consented, accurate, and unaffected by browser privacy restrictions.
Retailers build this asset through loyalty programs, account registrations, and app usage. Kroger’s 84.51 subsidiary has modeled behavioral profiles on more than 96% of American households based on years of loyalty card transaction history. That depth of purchase-level data is what makes commerce media targeting qualitatively different from cookie-based audience segments.
Privacy regulations including GDPR and CCPA have accelerated brand investment in commerce media precisely because the data supply is more defensible. Advertisers shifting budget away from third-party data-dependent channels find commerce media networks a structurally sound alternative.
Commerce Media Networks and Brand Strategy
For brands, the practical consideration is network selection. Most large CPG manufacturers now allocate dedicated budgets to commerce media, separate from traditional trade promotion and digital display. The strategic questions are which networks reach the brand’s core buyers and at what cost per incremental sale.
Smaller brands without the spend minimums required by Amazon’s managed service tier can access self-serve platforms. Amazon’s sponsored ads console, Walmart Connect’s self-serve dashboard, and Instacart Ads operate on auction-based cost-per-click models with no minimum spend requirement, making commerce media accessible beyond enterprise advertisers.
Agency holding companies have responded by building dedicated commerce media practices. Publicis Groupe’s Epsilon and WPP’s Choreograph both offer managed services for brands running multi-retailer commerce media programs, consolidating audience planning and measurement across Amazon, Walmart, and off-site programmatic in a single reporting layer.
Off-Site Commerce Media
The off-site segment extends retailer audiences beyond owned properties. A brand targeting Walmart’s “frequent snack buyers” segment can reach those users on news sites, streaming services, or social platforms through programmatic deals, with Walmart supplying the audience match and handling attribution back to in-store or online purchases.
Connected TV is a high-growth channel within this off-site layer. Kroger Precision Marketing and Instacart both offer CTV targeting using purchase-based segments, allowing brands to serve video ads on streaming platforms and measure whether exposed households converted in-store or online. This closes the historically difficult loop between brand-building video spend and actual sales.
Programmatic advertising infrastructure, particularly demand-side platforms and clean room technology, underpins the off-site expansion. Data clean rooms allow a retailer and a brand to match datasets without exposing raw customer records, enabling measurement that satisfies both privacy requirements and advertiser attribution needs.
Frequently Asked Questions
What is commerce media?
Commerce media is advertising built on first-party purchase data, using transaction records from retailers, banks, or travel platforms to target verified buyers and measure actual sales. Unlike traditional digital advertising, which relies on inferred intent from browsing behavior, commerce media connects ad spend to real buying decisions.
How is commerce media different from retail media?
Retail media refers specifically to advertising on retailer-owned properties like Amazon or Walmart.com. Commerce media is the broader category that includes retail media plus off-site extensions, connected TV campaigns, and non-retail platforms such as banks and travel companies that monetize their own transaction data.
What is closed-loop measurement in commerce media?
Closed-loop measurement is the ability to connect an ad impression directly to a purchase within the same data ecosystem. Because the retailer controls both ad serving and sales records, it can attribute a conversion to a specific campaign without relying on cross-domain modeling or third-party tracking.
What metrics are used to measure commerce media campaigns?
The two primary metrics are Return on Ad Spend (ROAS) and incremental ROAS (iROAS). ROAS measures total attributed revenue per dollar spent. iROAS isolates only the sales caused by the ad, excluding purchases that would have happened without it. Most sophisticated advertisers now prioritize iROAS because standard ROAS can overcount by including organic sales.
Which commerce media networks are the largest?
Amazon Advertising is the dominant platform, generating approximately $47 billion in revenue in 2023. Walmart Connect, Kroger Precision Marketing, Target’s Roundel, and Instacart Ads are the other major U.S. networks. JPMorgan Chase’s Chase Media Solutions, launched in 2024, represents the expansion of commerce media into financial services.
What to Watch
Commerce media is consolidating around a smaller number of high-data-density networks while expanding the definition of what counts as a commerce platform. Financial services, travel, and healthcare providers are each building media businesses on their transaction data, extending the model well beyond traditional retail. Brands allocating media investment should treat commerce media not as a subset of digital advertising, but as a distinct channel with its own data logic, measurement standards, and strategic role in the marketing funnel.