Retail data has moved beyond sponsored listings on a retailer's website. It can now help advertisers build audiences for open-internet campaigns, reach customers across channels and connect media exposure with real sales outcomes.
The Trade Desk positions its retail data offering as a global marketplace of retail partners inside a self-service platform. The opportunity is useful, but activation and measurement require more than selecting a segment. Advertisers must define the customer hypothesis, product scope, retailer coverage and attribution logic before launch.
Quick answer: The Trade Desk retail data marketplace lets advertisers activate purchase-based audience segments from participating retail partners across open-internet channels, including mobile, audio and connected TV. Retail measurement can connect campaign exposure with eligible online and in-store sales. Results depend on the selected retailer, permissions, product coverage, attribution and market availability.
What is the retail data marketplace?
The Trade Desk describes its platform as the world's largest marketplace of retail data partners. Advertisers can access participating retailers' purchase signals in one buying environment, use them to build relevant audiences and measure how open-internet media contributes to sales.
The marketplace links three jobs:
Audience discovery: identify customers based on real-world shopping behavior.
Media activation: reach those audiences across eligible channels outside a retailer's owned properties.
Sales measurement: connect exposure with eligible online and in-store transactions.
This is different from buying an onsite sponsored product ad. Retail data can be applied across the customer journey, including prospecting, brand building, consideration and repeat-purchase strategies.
How retail audience activation works
The Trade Desk says its retail data segments are built from billions of daily shopping moments from retailers and brands around the world. Available segments can include in-market audiences, loyalty shoppers and category buyers.
Audience type | Signal | Example campaign use |
|---|---|---|
In-market shoppers | Recent behavior suggesting active purchase intent | Reach customers considering a category now |
Category buyers | Purchases within a product vertical | Prospect among customers with proven category demand |
Loyalty shoppers | Repeat purchasing from a retailer or category | Support retention, replenishment or premium upgrades |
Brand buyers | Past purchase of the advertiser's products | Re-engage, cross-sell or suppress from acquisition |
Adjacent-behavior audiences | Related shopping patterns | Find relevant customers for non-endemic products or services |
Retail data can support non-endemic advertisers too. The Trade Desk gives the example of using adjacent purchase behavior to infer interest where the advertiser's product is not sold in a retail store. The key is to document why the shopping signal should predict relevance.
Build the audience around a hypothesis
Start with one business question, not a long segment list. A useful retail data hypothesis includes the target behavior, timing and expected outcome.
Example: Customers who bought premium baby products in the last 90 days may be more responsive to a family travel campaign than a broad demographic audience. The test should compare reach, conversion and sales outcomes against a suitable control or alternative audience.
Use four controls to keep the test readable:
Define recency and frequency windows that match the buying cycle.
Separate existing buyers from new-to-brand prospects where reporting allows.
Suppress audiences that should not receive acquisition messages.
Limit overlap so performance can be attributed to a clear segment strategy.
Activate retail data across the funnel
Funnel role | Audience approach | Media job | Primary evaluation |
|---|---|---|---|
Awareness | Broad category and adjacent-interest shoppers | Extend relevant reach across CTV, video, audio and display | Reach, frequency, completion and sales lift |
Consideration | Higher-intent category or competitor buyers | Explain product value and move customers toward research | Engaged visits, qualified activity and sales |
Conversion | Recent in-market or product-adjacent shoppers | Deliver a clear offer near the purchase window | Conversions, total sales and ROAS |
Retention | Past buyers, loyalty shoppers and lapsed customers | Support replenishment, cross-sell and reactivation | Repeat sales, purchase frequency and customer value |
Channel choice should follow the job. A retail segment does not make every impression lower-funnel. CTV can use purchase data for precise reach while still being judged on exposure and downstream sales, not clicks.
How retail measurement works
The Trade Desk says retail measurement can connect open-internet campaigns with eligible online and in-store sales. In-flight reporting can help advertisers see how customers respond and optimize while the campaign is running.
Measurement requires a clear product map. The Trade Desk recommends sharing the full list of relevant universal product codes (UPCs) with participating retailers so different package sizes and variations are not missed.
Measure the primary product and halo effect
Track the promoted products as a primary group, then create a secondary group for related products. A toothpaste campaign, for example, may influence toothbrush or mouthwash sales. Separating primary and halo products gives both a focused and a complete view.
Use consistent coverage across retailers
Single-retailer reporting can leave blind spots. The Trade Desk's Retail Sales Index is designed to provide consolidated sales and ROAS reporting across participating retailers with a streamlined attribution methodology. Coverage and availability must still be checked for the market and product set.
Measurement brief checklist
List every relevant UPC, package size and product variation.
Define primary products and halo products separately.
Confirm which retailers, stores and ecommerce sales are included.
Document the attribution window and conversion methodology.
Separate new, repeat and lapsed customers where available.
Agree on reporting latency and the earliest safe optimization point.
Compare retailer-reported sales with the advertiser's analytics without forcing them to match exactly.
State whether measurement is included, added value or separately priced.
Activation and measurement should inform each other
Retail data is most useful when the campaign creates a learning loop. Audience activation provides a customer hypothesis. Sales measurement shows whether the hypothesis worked. The next campaign then uses those outcomes to refine segment, channel, creative and product strategy.
The Trade Desk notes that retail sales insights can help identify less obvious customer groups and inform mid-flight optimization across channel, device, creative and audience. Advertisers can benefit from retail measurement even when they are not directly targeting retail audiences.
Costs and availability to confirm
Retail partner access is not identical across every campaign. Before activation, confirm:
segment pricing and whether fees are CPM-based or structured another way;
market, category and advertiser eligibility;
audience scale, recency and refresh cadence;
channels and inventory where the audience can be activated;
sales measurement coverage and any minimum spend;
whether measurement is included when the retailer's audience is activated;
data-use, reporting and export restrictions.
The Trade Desk notes that some retailers offer measurement as added value when advertisers activate that retailer's audience. Treat this as retailer-specific, not universal, and confirm the current terms with the platform account team.
Common retail data mistakes
Choosing segments by name alone. The definition, recency and scale matter more than the label.
Using too many overlapping audiences. Performance becomes difficult to diagnose.
Tracking only one product code. Package variations and halo sales can disappear from the analysis.
Judging upper-funnel media only by ROAS. Reach and exposure still matter.
Optimizing before sales data matures. Transaction reporting may lag delivery metrics.
Assuming every retailer provides the same coverage. Partners, terms and capabilities vary.
How AdGeeks can help
AdGeeks helps advertisers turn retail data into a testable audience and measurement plan. We can map retailer segments, structure exclusions, choose channel roles, prepare the UPC and halo-product framework, and manage activation through The Trade Desk.
For broader platform context, read The Trade Desk DSP and Kokai guide and the Walmart DSP planning guide.
Share the market, category, retailers and campaign objective. AdGeeks will map activation and measurement.
Frequently asked questions
What is The Trade Desk retail data marketplace?
It is a marketplace of participating retail data partners whose purchase-based signals can support audience activation and sales measurement within The Trade Desk.
Can retail data be used outside retailer websites?
Yes. The Trade Desk describes activation across open-internet environments including mobile, audio and connected TV, subject to partner and market availability.
Can non-endemic brands use retail data?
Yes. Adjacent shopping behavior can indicate interests relevant to services or products not sold by the retailer, but the relationship should be tested rather than assumed.
Can campaigns measure in-store sales?
Participating retail measurement can connect eligible exposure with online and in-store sales. Coverage, attribution and product eligibility vary.
What is the Retail Sales Index?
The Trade Desk presents the Retail Sales Index as a consolidated view of sales and ROAS across participating retailers using a streamlined attribution methodology.
Sources
The Trade Desk, “Retail Media.” Accessed October 14, 2026. https://www.thetradedesk.com/our-demand-side-platform/retail-media
The Trade Desk, “Scale your campaigns with retail data segments.” Accessed October 14, 2026. https://www.thetradedesk.com/resources/scale-your-campaigns-with-retail-data-segments
The Trade Desk, “Best practices to boost your retail measurement.” Accessed October 14, 2026. https://www.thetradedesk.com/resources/best-practices-to-boost-your-retail-measurement
The Trade Desk, “Retail Data on The Trade Desk Drives Real, Measurable Sales Outcomes.” Accessed October 14, 2026. https://www.thetradedesk.com/press-room/retail-data-on-the-trade-desk-drives-real-measurable-sales-outcomes
