---
title: Off-Site Extension and DSP Integration — RGM Training
url: https://realgrowthmatters.com/training/retail-media/off-site-extension-and-dsp-integration/
updated: 2026-06-10
source_html: https://realgrowthmatters.com/training/retail-media/off-site-extension-and-dsp-integration/
---

[Home](../../../index.html) › [Training](../../index.html) › [Retail Media](../index.html) › Off-Site Extension and DSP Integration

RGM° · Training

# Off-Site Extension and DSP Integration

The fastest-growing piece of retail media. How retailer first-party shopper data activates against open-web inventory.

### What you will learn

1. [Why off-site retail media is the fastest-growing piece of the ecosystem](#why)
2. [How off-site extension works: retailer audience data on open-web inventory](#how)
3. [The major retailer DSPs and what each does best](#dsps)
4. [Use cases: when off-site beats on-site or open-web programmatic](#use-cases)
5. [Planning off-site campaigns: targeting, creative, frequency](#planning)
6. [Measurement: closed-loop attribution against retailer sales](#measurement)
7. [Inventory types: display, video, CTV, audio, native](#inventory)
8. [Advanced playbook](#advanced)
9. [Common mistakes](#mistakes)
10. [Operating checklist](#checklist)

## Why off-site extension is the fastest-growing piece

On-site retail media (sponsored search, sponsored display on the retailer's property) is mature and well-understood. The fastest-growing piece is off-site — using the retailer's first-party shopper data to target advertising on the open web, social platforms, CTV, and audio. Off-site retail media revenue is projected to triple between 2023 and 2027, outpacing on-site growth meaningfully.

The reason is structural. As third-party cookies disappear and walled-garden platforms tighten their data, retailer first-party data becomes one of the most valuable targeting signals in advertising. Off-site extension lets advertisers attach that signal to inventory they could not previously target with retailer-grade precision.

## How off-site extension works

1. **Retailer audience build.** Inside the retailer's DSP, advertiser builds audiences from shopper behavior — bought brand X in 90 days, viewed category Y, lapsed buyer of SKU Z.
2. **Bidstream activation.** The retailer's DSP exposes those audiences as biddable segments across open-web inventory through its programmatic supply — either direct integrations or via a primary SSP partner.
3. **Closed-loop measurement.** When the user later returns to the retailer (in-store loyalty card, on-site purchase, app purchase), the retailer matches the conversion back to the off-site impression for measurement.

The closed-loop piece is what makes off-site retail media structurally different from open-web programmatic. A normal DSP buy on, say, The Trade Desk targeting a CPG audience gives you impressions on inventory but no first-party tie-back to actual purchase. The retailer DSP gives you both.

## The major retailer DSPs

| DSP | What it does best | Notes |
| --- | --- | --- |
| Amazon DSP | The most mature retailer DSP. Display, video, audio, OTT. Strong reach including Twitch and IMDb inventory. | Self-service requires minimum spend commit ($35k+ for managed service, lower for self-service via partners). |
| Walmart Connect DSP | Powered by The Trade Desk under the hood. Display, video, CTV (Vizio post-acquisition). | Strong for omnichannel campaigns combining in-store and online Walmart shoppers. |
| Roundel (Target) | Roundel self-service platform plus managed service. Premium-positioned shopper audience. | Strong for brands wanting Target's slightly higher-HHI shopper. |
| Kroger Precision Marketing (KPM) | 84.51°-powered audience science. Strongest in grocery CPG. | Higher CPMs reflect data quality. Loyalty-card-tied audiences are exceptional. |
| Instacart Ads (Display/CTV) | Cross-retailer grocery shopper data; CTV launched 2023–24. | Useful for CPG advertisers without a primary grocer relationship. |
| Criteo Commerce Media | Network of 200+ retailers. Off-site shopper graph that aggregates across retailers without exposing identity. | The closest thing to a cross-retailer DSP for off-site. |
| Albertsons Media Collective | Loyalty-card-tied audiences across Safeway, Vons, Albertsons banners. Display and video. | Strong for west-coast and pacific-northwest grocery CPG. |
| CVS Media Exchange & Walgreens Advertising Group | Pharmacy retail; OTC health, beauty, wellness audiences. | Required for any major pharmacy CPG brand. |

## Use cases: when off-site beats alternatives

### Off-site beats on-site when…

- You need awareness reach, not just bottom-funnel intent capture. On-site retail media reaches shoppers already on the retailer; off-site reaches them everywhere else they live.
- You need to influence shoppers before they reach the retailer — pre-shop research, category education, brand-building.
- You want video or CTV inventory; on-site video options are growing but still limited.
- You're targeting lapsed shoppers who aren't returning to the retailer naturally.

### Off-site beats open-web programmatic when…

- You can target by actual purchase history rather than third-party-data approximations.
- You need closed-loop measurement that attributes off-site impression to retailer sale.
- Privacy regulation or signal loss has degraded your open-web audience targeting.
- You're running co-op campaigns with the retailer where shared measurement matters.

## Planning off-site campaigns

### Audience construction

- **Buyer audiences:** Bought brand X in 30/60/90/180/365 days. Lapsed buyers (bought 6–12 months ago, none since). Heavy buyers (top quintile of category spend).
- **Category audiences:** Bought anything in category in window. Useful for cross-sell or new-product launches.
- **Browser audiences:** Viewed PDP but didn't buy. Added to cart but didn't purchase. Search queries indicating intent.
- **Lifestyle audiences:** Loyalty card data overlays — pet owners, parents of toddlers, premium-tier loyalty members.
- **Competitor audiences:** Bought competing brand. The conquest play.
- **Lookalikes / predictive audiences:** Retailer-built lookalikes from your seed list.

### Creative strategy

Off-site creative differs from on-site creative because the user isn't already on a shopping property. The creative must do the work of bringing them back — or, if the goal is awareness, build memory for when they next shop.

- **Lead with the product, not the retailer.** The retailer is the audience source, not the campaign theme.
- **Include retailer logo and CTA if the goal is store visit.** "Now at Target," "Shop at Kroger," etc. drives lift in store visits.
- **Match creative to audience stage.** Lapsed buyer creative differs from new-to-category creative. Both differ from heavy-buyer cross-sell creative.
- **Frequency cap aggressively.** Retailer audiences are smaller than open-web audiences. Without caps, you'll show the same person 30+ ads/month.

## Measurement: closed-loop attribution

The premier feature of off-site retail media is closed-loop measurement against retailer sales. Walk through what that looks like in practice.

1. User sees ad on open-web inventory (e.g., NYTimes.com display).
2. Retailer DSP logs impression with hashed user identifier.
3. User shops at retailer (online with login, or in-store with loyalty card).
4. Retailer matches purchase event back to impression log.
5. DSP reports attributed sales lift, new-to-brand %, category share.

Watch out for these measurement issues:

- **Attribution windows.** 7-day click + 14-day view is typical. Adjust based on purchase cycle — daily-purchase categories need shorter windows; quarterly-purchase categories need longer.
- **Causal vs correlational lift.** Closed-loop attribution shows correlation. Incrementality testing shows causation. Both required for full picture.
- **Cross-retailer cannibalization.** Off-site campaign on Retailer A might shift sales from Retailer B without growing total category — bad for the brand even if Retailer A reports lift.
- **In-store match rates.** In-store loyalty match rates run 30–60% in most categories. Means measurement under-counts true off-site impact for in-store-heavy categories.

## Inventory types

| Inventory type | Strengths | Use case |
| --- | --- | --- |
| Open-web display | Reach, low CPMs, frequency build | Always-on category presence; retargeting cart abandoners |
| Open-web video (pre/mid/post-roll) | Storytelling, brand-building | New product launches, category education |
| CTV (connected TV) | Premium attention, household-level addressability | Brand-building with retailer audience overlay; the fastest-growing off-site piece |
| Audio (podcast, streaming radio) | Sustained attention, intimate format | Brand awareness for categories with strong audio listenership (auto, finance, health) |
| Native | Looks like content; lower banner blindness | Mid-funnel education; sponsored content |
| Social platforms (Meta, TikTok) | Retailer-audience activation on social inventory | Available through some retailer DSPs as social inventory partnerships expand |
| DOOH (digital out of home) | Geo-located inventory near retailer locations | Drive store visits for offline-heavy retailers |

## Advanced playbook

- **Sequenced cross-retailer activation.** Use Criteo's cross-retailer graph or Instacart's aggregated network for category brands that aren't exclusive to one retailer. Avoid wasted impressions on shoppers loyal to a single retailer not in your distribution.
- **Lapsed buyer reactivation.** The highest-ROAS use case in off-site. Buyers who lapsed 6–18 months ago convert 2–3× better than cold prospects when shown reactivation creative.
- **Trade event amplification.** When a retailer features your brand in flyer, app, or end-cap, mirror that with off-site retailer-audience media to drive incremental visits during the promo window.
- **Audience suppression.** Always suppress recent purchasers from off-site spend. Always suppress employees and known fraud signatures. Always suppress audiences you're reaching elsewhere if frequency control matters.
- **CTV-on-Amazon (Streaming TV / Freevee).** Combines Amazon DSP audience precision with premium CTV inventory. The strongest off-site format Amazon offers for awareness-stage brands.
- **Loyalty tier targeting.** Kroger and Albertsons expose loyalty tier as audience attribute. Premium tier targeting (top 20% spend) is gold for premium brands.
- **Recipe and meal-occasion targeting.** Grocery retail media DSPs let you target by recipe interaction, meal-occasion search, basket pattern (e.g., taco-night basket). Brand creative aligned to occasion lifts CTR meaningfully.
- **Co-op funding negotiation.** Retailers often co-fund off-site campaigns at 50–100% when tied to JBP commitments or new product launches. Always ask.
- **Frequency-capped sequencing.** 4–6 impressions in week 1 of awareness flight, taper to 2–3/week in maintenance. Sustained at 0 outside flight windows.
- **Open-web display + retailer audience as cookieless replacement.** As third-party cookies fail, retailer audiences become one of the strongest substitutes for legacy programmatic targeting. Build the bench now.

## Common mistakes

- Treating off-site retailer DSP as just another programmatic buy — you ignore the audience data, which is the whole value.
- Running off-site without closed-loop measurement turned on — you optimize against open-web KPIs that don't match the brand's actual goal.
- Choosing one retailer DSP as a monopoly because their sales rep is convincing — ignore alternative networks where your audience overlap differs.
- No frequency caps — small retailer audiences burn through impressions to the same households many times over.
- Creative built for on-site reused as-is for off-site — doesn't translate.
- Off-site measurement compared apples-to-apples with on-site ROAS — off-site is upper-funnel and will look worse on last-click; that's fine, plan for it.
- Confusing closed-loop attribution with incrementality; running no holdouts.
- Forgetting to suppress current customers from prospecting off-site flights — you pay to talk to people already buying.
- No alignment with retailer co-op or JBP commitments — missing free or shared-funded inventory.
- Underinvesting in CTV through retailer DSPs because the team's open-web CTV team thinks they have it covered — closed-loop CTV is structurally better.

## Operating checklist

- Active off-site programs on each of your top 3 retailers (or Criteo/Instacart equivalents if not direct)
- Audience strategy documented per retailer: buyer, lapsed, browser, lifestyle, competitor, lookalike
- Closed-loop measurement turned on; attribution windows aligned with category purchase cycle
- Creative variants for each audience stage (cold/category/lapsed/heavy-buyer)
- Frequency caps set; documented per audience size
- Suppression lists active: current customers, recent purchasers, employees
- Inventory mix beyond display: video, CTV, audio where supported
- Quarterly incrementality testing on top retailer DSP
- Co-op funding inquiries during JBP cycles
- Open-web cookieless transition plan that incorporates retailer DSPs as primary substitute

## Sources and further reading

- Amazon DSP, Walmart Connect DSP, Roundel, Kroger Precision Marketing, Albertsons Media Collective, Instacart Ads — native platform documentation
- Criteo Commerce Media Network — cross-retailer activation playbooks
- IAB Retail Media Off-Site Standards working group documents
- eMarketer / Insider Intelligence off-site retail media forecasts
- Tinuiti Off-Site Retail Media Quarterly Report
- The Trade Desk — retail media on programmatic infrastructure documentation
- Path to Purchase Institute — off-site retail media case studies
- The Drum, Modern Retail, AdExchanger — off-site retail media coverage
- Skai Retail Media Insights
- Andrea Leigh, Allume Group — Amazon DSP playbooks
- RGM internal benchmarks — off-site retail media performance by category

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Part of the [Retail Media](../index.html) series. Continue to the next module or take the [series exam](../exam/index.html).