Walmart Connect Just Shipped Negative Keywords. Here's the Spend You Can Stop Wasting.

If you advertise on Walmart and your ACoS has always run higher than it should, part of the reason was structural, not your bidding. Until now, Walmart Connect had no clean way to block irrelevant search terms. You paid for every brand-adjacent, mis-mapped, low-intent click the auction sent you and had no lever to turn it off. That changed on July 29, 2026, when Walmart Connect rolled out negative keywords for Sponsored Products.

The recommendation is simple: treat launch week as a spend audit, not a nice-to-have. Any campaign with a real search-term tail has been leaking budget on queries that never convert, and you can now stop it. This is the closest thing to found margin that Walmart has handed advertisers in a while.

What actually launched

Sellers can now add exact and phrase match negatives at both the campaign and ad group level, the same structure Amazon Ads has offered for years. The rollout covers manual Sponsored Products campaigns and automatic campaigns running on fixed bidding. Negative exact blocks a query only when it matches the excluded term word for word. Negative phrase blocks any query that contains the term in order, which is the heavier lever for cutting whole clusters of junk traffic.

If you run Amazon PPC, this is not a new mental model. It is a tool you already know, finally available on the channel where you have been flying without it.

Why this moves your numbers, not just your workflow

Negative keywords do not make clicks cheaper. They stop you from buying the wrong clicks. On Walmart specifically that matters more than it sounds, because automatic campaigns and broad manual targets have been pulling in category-adjacent and competitor-branded queries with no way to exclude them. That traffic converts poorly and drags your blended ACoS up.

Remove it and two things happen. Your ACoS on affected campaigns compresses, and the real question shifts to budget allocation: once Walmart campaigns stop wasting spend, the ROAS math on whether Walmart deserves a bigger slice of your H2 retail media budget changes. Do not treat the compression as a guaranteed number. Industry analysts expect improvement inside the first two weeks on campaigns with a meaningful search-term tail, but the size depends entirely on how much junk traffic your account was absorbing. Measure your own accounts before and after.

The launch-week playbook

Move fast while the wasted spend is still live in your reports.

1. Export the last 30 days of the search-term report for every Sponsored Products campaign. This is your evidence base.
2. Tag every term with zero conversions and above-average spend. Those are your first phrase-match negatives.
3. Add competitor brand terms you never want to pay for as exact-match negatives.
4. Add category-adjacent terms that convert for other brands but bleed your ACoS as phrase negatives.
5. Rerun the report at day 7 and day 14 and add new negatives each time. This is a weekly operating habit, not a one-time cleanup.

The mistake to avoid is over-blocking on day one. Do not dump every low-converting term into a negative list in a single pass. A term with two conversions on thin data is not junk yet. Cut the clear zero-conversion, high-spend terms first, then tighten weekly as the data fills in.

The cross-marketplace angle

For brands running both channels, this narrows the operational gap between Amazon and Walmart advertising. The same search-term hygiene you already run on Amazon now applies to Walmart, which makes it easier to manage both to one standard instead of accepting Walmart as the sloppier channel by default. If you have been under-investing in Walmart Connect because the efficiency never penciled out, this is the moment to rerun the numbers. Less wasted spend can be the difference that makes the channel worth scaling.

Negative keywords are only as good as the discipline behind them. The operators who capture the full benefit are the ones who build the weekly search-term review into their process, not the ones who add a list once and move on.

If you want your Walmart Connect campaigns rebuilt around this, with the search-term cleanup done right and the budget reallocated to what actually converts, a strategy assessment is the fastest way to get started.