Building Real Growth on Walmart Marketplace: What It Actually Takes
Walmart Marketplace has grown faster than almost anyone in our industry predicted five years ago. More third-party sellers, more shopper traffic, a fulfilment network that has become genuinely usable, and a seller platform that finally holds up under real operational load.
But riding a platform’s growth is not the same as growing on it. A rising marketplace rewards sellers who show up prepared, with the right products, the right content and the right economics. Everyone else simply adds another dashboard to check.
At MMOBIEL we sell a deliberately wide assortment - phone repair parts, golf rangefinders, drawing robots for kids - across Amazon, bol.com, eBay, Kaufland and Walmart, from the Netherlands to customers worldwide. Walmart is the channel we most recently committed to properly, and it has become one of the most instructive builds we have done. This is what that growth required.
The path we followed: earn the economics first, expand second.
01 Why we committed to Walmart properly
Plenty of sellers list on Walmart. Far fewer build on it. The difference is not ambition - it is whether the channel is given real ownership, real budget and a real standard to hit.
What made the case for us was specific to the platform rather than to anything else in our portfolio:
- A large and still-growing shopper base, with categories where the competitive set is not yet fully formed.
- A fulfilment network that has matured to the point where a European seller can offer genuinely competitive delivery promises in the US.
- A marketplace that rewards operational quality - complete data, strong content, reliable delivery - which happens to be what we are good at.
- A shopper profile that suits the breadth of our assortment rather than forcing us into a single category.
The reason we hesitated for as long as we did was honest. We did not want a half-hearted channel that would consume team hours and return a rounding error. A marketplace run at fifty percent effort tends to produce far less than fifty percent of the result.
So we set a rule before starting. Walmart would either be treated as a real channel with real ownership, or we would not do it at all. Everything that follows came out of that decision.
02 Growth came from fewer SKUs, not more
The instinct when opening a new marketplace is to push the whole catalogue live and see what sticks. We have done that before on other channels. It produces a long tail of dead listings, a support burden, and no clear signal about what is actually working.
Win a narrow set of SKUs completely before widening the catalogue. Scale after signal, never before it.
Counter-intuitively, the fastest route to growth was launching less. A small, deliberately chosen cohort gave us something a broad launch never does: a clean read on what works on this specific platform, early enough to act on it.
The measure that keeps that discipline honest is net profit per SKU per channel. A marketplace that grows top line while quietly diluting margin is not growth - it is a more complicated way to be less profitable.
A broad launch produces volume. A scored cohort produces signal.
Lever one: choose SKUs on Walmart economics
Before a single listing went live, we scored the existing assortment against Walmart specifically. Demand signals on the platform, competitive density, price positioning against incumbent sellers, shipping weight and dimensions, return-rate history, and - critically - landed margin after Walmart’s referral and fulfilment fees.
Strong performance elsewhere in our portfolio turned out to be a weak predictor. Several of our established sellers were eliminated immediately on shipping economics alone. Uncomfortable, but useful: the first cohort we launched had a genuine chance of profitability rather than a vague hope of it.
Lever two: content built for Walmart, not recycled
This is the mistake we see most often, and we made an early version of it ourselves. Walmart’s search has its own logic. Attribute completeness carries real weight. Content quality is scored explicitly and visibly, and that score influences discoverability. A listing ported over from another marketplace is not a Walmart listing - it is a Walmart listing with the wrong instincts baked in.
So we stopped treating listing content as translation work and started treating it as channel-native work. Titles rebuilt to Walmart’s conventions, every applicable attribute filled rather than the required minimum, imagery restructured to Walmart’s guidelines, and copy written for a US shopper from the ground up.
Tedious? Yes. It is also the single change with the clearest line to sales growth.
Lever three: fulfilment and price as one decision
Winning the Buy Box on Walmart depends heavily on delivery speed and total landed price. Treating fulfilment strategy and pricing strategy as separate workstreams - which is roughly how most teams are organised - guarantees you optimise one and undermine the other.
We moved our highest-velocity SKUs into Walmart Fulfillment Services to secure competitive delivery promises, kept slower-moving and awkward-to-ship items on seller-fulfilled, and rebuilt repricing logic around the combined position rather than price alone. Both are now reviewed together in a single weekly cycle.
The three levers that moved the channel, and what they feed.
03 Scaling the catalogue without scaling the headcount
The constraint on growth was never ambition. It was capacity. Building channel-native content for hundreds of SKUs is exactly the kind of work that quietly eats a team.
AI removed the volume problem. Our position on it is straightforward: it handles the volume, people still make the calls.
- Catalogue preparation. First-pass, channel-native listing copy and attribute mapping across hundreds of SKUs - then reviewed and corrected by a specialist before anything publishes.
- Competitive and keyword research. Days of manual scanning compressed into a working shortlist our product manager can interrogate.
- Reporting. Raw performance exports turned into a readable weekly picture, so meetings are spent on decisions rather than on assembling numbers.
What stays with people: pricing guardrails, anything touching compliance or product safety claims, and final publication of listing content. Nothing goes live unreviewed.
The review gate is the reason volume did not cost us quality.
The uncomfortable truth is that AI made the underlying discipline more important, not less. Generating a thousand listings quickly is only an advantage once you have decided which thousand deserve to exist.
04 What we got wrong
Three things, honestly.
We launched too broad in the first wave
Despite the plan, a batch of “why not, it is already in stock” SKUs made it through. They generated almost nothing and consumed a disproportionate share of catalogue maintenance and support time. We pruned them and the channel got healthier immediately.
We underestimated returns and customer expectations
US shopper behaviour on returns differs from what our European operation is calibrated for. Certain categories had to be re-described, repackaged and re-supported after the fact - always more expensive than doing it up front.
We treated the first content pass as good enough
It was not. Relaunching that content - proper attributes, proper imagery, proper US-facing copy - moved performance more than any pricing change we made. It should have come first, not second.
05 Where the next phase of growth comes from
Three priorities for the coming quarters.
Widening the catalogue
But only in the categories where the first cohort has proven unit economics. The discipline that got us here is the same discipline that scales it.
Advertising maturity
Walmart Connect rewards operators who learn it early and run it with discipline. We are building that capability in-house now rather than waiting until efficient acquisition becomes harder to find.
Cross-channel intelligence
What we learn about a product on Walmart should reach every other storefront we run, and what we know elsewhere should reach Walmart faster. Right now those insights travel too slowly and too informally.
06 A closing thought
The most valuable outcome of growing on Walmart was not the revenue line. It was what building it forced us to confront about our own operation.
Working on a channel with no history, no ranking, no reviews and no shortcuts exposed how much of our performance elsewhere rests on accumulated advantage rather than current execution. Building from zero again made us sharper about content, stricter about margin, and considerably more honest about which products deserve our attention.