Retail media is advertising sold by a retailer or marketplace on its own digital properties and audiences, such as sponsored products in search results, display placements on category pages and ads targeted with the retailer’s first-party shopper data. In e-commerce commerce marketing, it lets brands and sellers reach shoppers at the moment and place where they are choosing what to buy.
A retailer that runs such a business operates a retail media network, which combines ad inventory, targeting based on purchase behavior, self-service or managed buying tools, and closed-loop measurement that links ad exposure to actual sales. For retailers, it is a high-margin revenue stream; for brands, it is a channel that sits closer to the transaction than most other advertising.
How retail media works
Retail media works by turning a retailer’s traffic and shopper data into sellable ad inventory. Advertisers, usually brands whose products the retailer sells or third-party marketplace sellers, buy placements through auctions or fixed-price deals, and the retailer measures results against its own sales records.
- The retailer defines ad placements in search results, product pages, category pages, apps and emails.
- Advertisers select products, audiences or keywords and set bids and budgets, commonly on a cost-per-click basis.
- An ad server and auction decide which ad appears, combining bid with relevance and product availability.
- Shoppers see and interact with the ads within their normal shopping journey.
- The retailer attributes orders to ad exposure within a defined attribution window and reports results.
The defining advantage is the closed loop: the same company that shows the ad also records the purchase, so it can report sales, new-to-brand customers and return on ad spend without relying on third-party cookies or modeled conversions.
Ad formats and placements
Retail media formats range from search-based sponsored listings that look like ordinary products to video and display that reach shoppers outside the store. The table summarizes the main formats.
| Format | Where it appears | Typical buying model | Main objective |
|---|---|---|---|
| Sponsored products | Search results and product pages | Cost per click, auction | Sales of specific items |
| Sponsored brands | Banners above search results | Cost per click or impression | Brand consideration |
| Onsite display | Home, category and product pages | Cost per thousand impressions | Awareness within the store |
| Offsite media | External sites, social, streaming | Cost per thousand impressions | Reach with retailer audiences |
| In-store digital | Screens and kiosks in physical stores | Fixed or impression-based | Influence at the shelf |
Sponsored products usually account for the largest share of spend, because they appear inside search results with strong purchase intent and their cost is easy to connect to orders.
Key metrics and measurement
Retail media reporting focuses on sales-linked metrics, but their values depend heavily on how the retailer defines attribution. The table lists the common measures and what to check before trusting them.
| Metric | Definition | What to check |
|---|---|---|
| ROAS | Attributed sales divided by ad spend | Attribution window and view-through rules |
| ACoS | Ad spend divided by attributed sales | Inverse of ROAS; compare with margin |
| New-to-brand share | Orders from first-time brand buyers | Look-back period used to define new |
| Incremental sales | Sales that would not occur without ads | Requires holdout or experiment design |
| Share of search | Share of top results held by a brand | Organic versus sponsored positions |
The central measurement problem is incrementality. Many attributed sales would have happened anyway, especially for branded searches, so mature advertisers use holdout tests or controlled experiments rather than relying on reported ROAS alone. Attribution windows commonly range from 7 to 30 days, which makes results from different networks hard to compare.
Retail media compared with related commerce marketing channels
Retail media sits between search advertising and trade marketing. The table contrasts it with neighboring channels in commerce marketing such as Google Shopping and affiliate marketing.
| Channel | Who sells the ad | Data used for targeting | Where the sale happens |
|---|---|---|---|
| Retail media | The retailer or marketplace | Retailer first-party purchase data | On the retailer’s own store |
| Google Shopping | A search engine | Search queries and product feed data | On the advertiser’s store |
| Affiliate marketing | Independent publishers | Publisher audience and content | On the merchant’s store |
| Social commerce ads | Social platforms | Interests and engagement | In-app or on the merchant’s store |
Google Shopping campaigns depend on product data submitted through Merchant Center, while retail media uses the catalog the retailer already holds. The difference is who owns the shopper and the transaction: in retail media, both belong to the retailer.
Risks and practical considerations
Retail media creates tension between advertising revenue and shopper experience. Too many sponsored results push relevant organic products down, which can lower customer satisfaction and long-term conversion for the retailer itself.
- Fragmentation: brands must manage many networks with different tools, metrics and definitions.
- Cannibalization: ads on a brand’s own search terms may buy sales already earned organically.
- Out-of-stock spend: ads should pause automatically when the advertised item is unavailable.
- Data privacy: offsite targeting with shopper data must respect consent and privacy regulations.
- Pay-to-play pressure: smaller suppliers may feel compelled to buy ads to remain visible.
Advertisers get the best results by aligning spend with margin and stock, separating brand-defense from growth campaigns, and asking networks for incrementality evidence rather than headline ROAS figures.
In plain words
Retail media is advertising inside an online shop. When you search a large store’s website and see a product marked “sponsored”, a brand has paid the store to show it to you there.
It is similar to a supermarket charging a brand to place its cereal at eye level or at the end of an aisle. The difference online is that the shop knows what people buy and can show advertisers whether the ads actually led to sales.
A real-world example
A mid-sized pet food brand sells through a large online pet supplies retailer. Its new grain-free product line appeared on the third page of search results, and sales were low despite good reviews.
The brand launched sponsored product campaigns on category keywords such as “grain-free dog food” with a cost-per-click bid, kept a separate low-budget campaign for its own brand name, and asked the retailer for a four-week holdout test in which a share of shoppers saw no ads.
The test showed that the category campaigns brought in mostly new-to-brand buyers with clear incremental sales, while the brand-name campaign mainly captured shoppers who would have purchased anyway. The brand moved budget toward category keywords and reduced spend on its own name.