Direct brand outreach is still supported only by media sources

On 22 October, an industry outlet reported that Walmart Connect’s sales team had begun offering brands lift studies directly ahead of the holiday season. It cited three agency executives; one said at least four of the agency’s clients were participating. Brands, spending levels and campaign dates were not named, and Walmart had not responded by publication time. [1 · Digiday · report on direct lift-study offers, 22 October 2026]

Walmart Connect’s official materials do confirm the measurement infrastructure itself. The menu includes Display Brand Lift Study, add-to-cart analysis, the influence of display ads on sponsored search, and omni-media impact analysis. Brand lift is subject to qualification criteria; a separate page says custom reports are available through managed service. [1 · Digiday · report on direct lift-study offers, 22 October 2026] [2 · Walmart Connect · official integrated measurement page] [3 · Walmart Connect · official brand-building solutions]

The official description does not, however, confirm the newly reported outreach or promise measurement of incremental sales specifically. Display Brand Lift Study examines shifts in awareness, favorability, purchase intent and brand preference. The report says advertisers still cannot execute the tests independently and that final reporting may take up to nine weeks after a campaign ends. [1 · Digiday · report on direct lift-study offers, 22 October 2026] [2 · Walmart Connect · official integrated measurement page] [6 · IAB and IAB Europe · Guidelines for Incremental Measurement in Commerce Media, 2025]

Brand lift and sales incrementality answer different questions

The commercial logic is clear: in the fourth quarter, brands defend media budgets to finance leaders, while Walmart Connect can sell not only inventory but access to store and ecommerce data. That makes measurement part of the network’s product. It does not make a platform-issued report an independent evaluation. [1 · Digiday · report on direct lift-study offers, 22 October 2026] [2 · Walmart Connect · official integrated measurement page] [4 · Walmart Connect · official retail media profile]

Brand lift asks whether stated perceptions changed among exposed people. Sales incrementality compares observed purchases with the counterfactual—what would have happened without the advertising. Connecting the two requires a prespecified control group, comparable exposure assignment, consistent observation windows and a calculation of incremental gross profit rather than merely revenue attributed to a contact. [1 · Digiday · report on direct lift-study offers, 22 October 2026] [2 · Walmart Connect · official integrated measurement page] [6 · IAB and IAB Europe · Guidelines for Incremental Measurement in Commerce Media, 2025] [8 · Marketing Science · randomized retailer advertising experiment]

The causal strength of the new studies cannot be judged without protocols. Advertisers need sample formation rules, minimum detectable effect, pre-test balance, overlap with other channels, a definition of new-to-brand purchasing, confidence intervals and full costs. Otherwise, an attractive lift could reflect seasonality, audience differences or purchases that would have occurred anyway. [1 · Digiday · report on direct lift-study offers, 22 October 2026] [2 · Walmart Connect · official integrated measurement page] [6 · IAB and IAB Europe · Guidelines for Incremental Measurement in Commerce Media, 2025] [7 · Quarterly Journal of Economics · uncertainty in measuring advertising returns] [8 · Marketing Science · randomized retailer advertising experiment]

Expert commentary

If the media report is accurate, Walmart Connect is changing the object of negotiation: advertisers buy not only impressions but a promised answer to “what changed because of the campaign?” For retail media networks, that is an important shift—measurement becomes a competitive product function. For now, it is still a sales process and intent, not published evidence of effectiveness. [1 · Digiday · report on direct lift-study offers, 22 October 2026] [2 · Walmart Connect · official integrated measurement page] [4 · Walmart Connect · official retail media profile]

Direct contact with a brand can speed up test approval and bring platform analysts closer to the advertiser’s business question. Bypassing the agency also weakens independent scrutiny and concentrates roles: the same party sells the media, decides study eligibility, holds the data and reports the result. The brand should therefore retain its own analysis plan before launch. [1 · Digiday · report on direct lift-study offers, 22 October 2026] [2 · Walmart Connect · official integrated measurement page] [3 · Walmart Connect · official brand-building solutions]

Four stages must remain separate: ad exposure, a change in awareness or intent, an incremental purchase and incremental profit. Walmart’s official Display Brand Lift Study mainly addresses the second stage. Even a statistically significant rise in purchase intent does not guarantee sales, and attributed revenue does not prove that an order would not have happened without advertising. [2 · Walmart Connect · official integrated measurement page] [3 · Walmart Connect · official brand-building solutions] [6 · IAB and IAB Europe · Guidelines for Incremental Measurement in Commerce Media, 2025]

Industry guidance centers on a credible counterfactual, bias control and separation of signal from noise. In practice, that means a randomized holdout where feasible, prespecified metrics and attribution windows, controls for concurrent promotions and explicit uncertainty. A closed report without those elements may aid optimization but is weaker evidence for reallocating budget. [1 · Digiday · report on direct lift-study offers, 22 October 2026] [6 · IAB and IAB Europe · Guidelines for Incremental Measurement in Commerce Media, 2025]

Research illustrates both sides of the problem. A randomized ad test for another retailer across 3 million users estimated a 3.6% sales lift, but a specialized control design materially improved precision. An analysis of 25 large field experiments found very wide ROI intervals. Data scale alone is not enough when the advertising effect is small relative to natural purchase variation. [7 · Quarterly Journal of Economics · uncertainty in measuring advertising returns] [8 · Marketing Science · randomized retailer advertising experiment]

Over the next two quarters, the useful signals are not how many studies were offered, but completion rates, reporting time, protocol transparency and result repeatability. Decision-grade outputs include incremental ROAS, incremental gross profit, new-to-brand buyers, repeat purchase and confidence intervals. If Walmart Connect enables comparable and independently challengeable measurement, it gains an advantage; otherwise, lift remains a sales tool for the advertising itself. [1 · Digiday · report on direct lift-study offers, 22 October 2026] [2 · Walmart Connect · official integrated measurement page] [6 · IAB and IAB Europe · Guidelines for Incremental Measurement in Commerce Media, 2025] [7 · Quarterly Journal of Economics · uncertainty in measuring advertising returns] [8 · Marketing Science · randomized retailer advertising experiment]

Sources

  1. Digiday · report on direct lift-study offers, 22 October 2026 — The outlet cites three agency executives; at least four clients of one agency are participating. Brand names and spend thresholds were not disclosed, and Walmart had not responded by publication time.
  2. Walmart Connect · official integrated measurement page — The primary source confirms Display Brand Lift Study, add-to-cart analysis and other tools. The study is subject to qualification criteria; the page does not confirm the direct brand outreach described by the media report.
  3. Walmart Connect · official brand-building solutions — The primary source describes brand lift as measurement of perception, purchase intent and preference; some custom reporting is available through managed service. Its benchmarks concern earlier studies, not the newly reported push.
  4. Walmart Connect · official retail media profile — Primary source for the note on Walmart Connect, its advertising formats, shopping data and omnichannel measurement.
  5. Walmart · official company profile — Primary source for the note on the US omnichannel retailer, its stores and ecommerce operations.
  6. IAB and IAB Europe · Guidelines for Incremental Measurement in Commerce Media, 2025 — The industry guide distinguishes experiments, model-based counterfactuals and other methods; its core principles are a credible counterfactual, bias control and separation of signal from noise. It does not assess Walmart.
  7. Quarterly Journal of Economics · uncertainty in measuring advertising returns — Across 25 large field experiments, the median confidence interval for ROI exceeded 100 percentage points. The paper shows why even large tests may be imprecise; it did not study Walmart.
  8. Marketing Science · randomized retailer advertising experiment — An experiment with 3 million users found a 3.6% sales increase versus control and showed how control-group design affects precision. It involved another retailer and does not establish Walmart Connect performance.