How can advertising agencies master Walmart Connect – Walmart’s fast-growing retail media platform – to drive better results for their eCommerce clients? This question was at the heart of a recent Marketplace Masters episode featuring host Paul Sonneveld (Co-Founder & CEO of MerchantSpring) and guest Harry Clayman (Senior Partner, Measurement Partnerships at Walmart Connect).
In their discussion, Clayman shares insider insights on what sets Walmart Connect apart and how agencies can transition their skills to this ecosystem. From Walmart’s unparalleled scale and first-party data advantages to its full-funnel ad solutions and new optimisation tools, the conversation revealed a roadmap for agencies looking to excel on Walmart’s retail media network. Below, we synthesise the key takeaways – including omnichannel advertising opportunities, measurement and metrics, and practical best practices – into an actionable guide for agencies aiming to broaden their expertise and accelerate client growth through Walmart Connect.
Walmart Connect offers a combination of assets that is difficult to match: massive scale, rich first-party data, a full suite of omnichannel ad placements, and closed-loop measurement. According to Clayman, Walmart is the number one omnichannel retailer in the U.S., with 4,600+ stores and approximately 150 million customers shopping in-store or online each week(walmartconnect.com). This scale – coupled with Walmart’s deep first-party data on shopper behavior – means advertisers can reach a huge audience of high-intent consumers and directly measure how ads translate into sales both online and in-store. In an era focused on performance and accountability, that closed-loop visibility is a game changer.
For agencies, the opportunity is clear. Walmart Connect enables firms to diversify their clients’ media mix beyond Amazon and Google, tapping into a retail media channel that drives tangible sales outcomes. “There’s a huge opportunity right now,” notes Clayman, as more brands demand measurable ROI and want to close the loop between ad spend and conversion. By investing in Walmart’s ecosystem, agencies can unlock new revenue streams and upsell clients in a strategic way – positioning themselves as forward-thinking partners who deliver results. Whether through sponsored search, onsite display, off-site programmatic, or even in-store ads, Walmart Connect offers an array of touchpoints to engage shoppers. Crucially, all of these tie back to Walmart’s sales data, allowing agencies to attribute ad spend to actual purchases in a way that few platforms can match.
“Walmart Connect brings together scale, rich first-party data, and omnichannel solutions with closed-loop measurement. Advertisers can reach millions of high-intent shoppers and directly connect campaigns to real sales outcomes – that’s incredibly powerful.” – Harry Clayman, Senior Partner, Walmart Connect
One reason agencies can’t afford to ignore Walmart Connect is the breadth of advertising solutions available to reach customers at every stage of the funnel. Clayman highlights that Walmart Connect has built a full-funnel ecosystem spanning search, display, off-site, and in-store channels – enabling brands to drive awareness, consideration, and conversion within Walmart’s universe.
Sponsored Search: On Walmart’s site and app, brands can leverage Sponsored Search ads to capture high-intent shoppers. Within search, there are multiple formats: Sponsored Products (promoted item listings that drive conversion), Sponsored Brands (banner ads that showcase a brand logo and products to build awareness), and Sponsored Videos (video ads that engage customers with richer content). Sponsored Products are the foundation for driving sales, boosting product visibility in search results.
Meanwhile, Sponsored Brands and Videos play a more upper-funnel role by increasing brand visibility and consideration. Notably, Walmart’s data shows these formats can introduce brands to new customers – in fiscal 2025, 46% of all orders from Sponsored Brands ads were from new-to-brand customers, underscoring how these placements expand reach. Agencies should use a mix of these search ad types to both capture active shoppers and build brand equity with Walmart’s audience.
Onsite Display: Beyond search ads, Walmart Connect’s onsite display ads allow brands to visually engage shoppers browsing Walmart’s website or app. These banner and native display ads appear in prominent placements (homepages, product detail pages, etc.), catching the eye of customers who may not be actively searching for the product yet. Onsite display is an excellent complement to sponsored search – it can stimulate demand by reaching those who haven’t searched, and re-engage shoppers who showed interest.
In fact, Walmart’s data indicates a powerful synergy when search and display are combined: shoppers exposed to both Sponsored Search and Walmart Onsite Display ads are, on average, up to 3× more likely to buy a brand’s products and spend up to 40% more on that brand. The takeaway for agencies is to adopt a full-funnel approach on Walmart Connect – pairing search and display advertising to maximize impact. Brands that layer in display advertising alongside their search campaigns can significantly boost their conversion outcomes and basket sizes.
Off-Site Media (Programmatic & CTV): Walmart Connect isn’t confined to Walmart-owned properties. Through the Walmart DSP (Demand-Side Platform), advertisers can run programmatic display and video campaigns across a vast network of external websites, mobile apps, and CTV (Connected TV) streaming platforms. Built in partnership with The Trade Desk, Walmart’s DSP lets brands use Walmart’s first-party shopper data to target ads out in the open web and on streaming services – reaching Walmart shoppers when they’re, for example, watching their favorite show or browsing news sites.
This off-site advertising drives brand and product awareness by inserting Walmart-connected ads into customers’ everyday media consumption. Agencies can thus extend their client’s reach beyond Walmart’s walls while still targeting Walmart’s audience. And importantly, because these off-site ads are tied back to Walmart’s data, their performance can be measured in terms of in-store or online sales lift, providing a true closed-loop for awareness campaigns. For instance, running a CTV video ad via Walmart DSP can later be linked to a viewer purchasing that product on a Walmart store trip – insight that traditional TV advertising could never provide.
In-Store Activations: Uniquely, Walmart Connect also bridges into physical retail through in-store advertising. Brands can run campaigns on digital TV Wall screens in Walmart stores, sponsor content on the self-checkout kiosks, run in-store audio ads, or even execute product sampling and demos via Walmart’s channels. These tactics allow agencies to influence shoppers at the point of purchase in brick-and-mortar stores – a capability that most other ad platforms don’t have. With Walmart’s reach of millions of in-store shoppers weekly, such in-store media placements can reinforce messages seen online or introduce new products in an attention-grabbing way (e.g. a video ad on a Walmart TV wall in electronics or grocery). And thanks to Walmart Connect’s integration, advertisers can measure the effect of these in-store ads on sales, completing the omnichannel loop.
By deploying this suite of solutions together, agencies can create an omnipresent brand experience: guiding the customer from initial awareness (CTV and display ads), to consideration (search and video ads on Walmart.com), all the way to conversion (sponsored products at the point of purchase, whether online or in-store). The key is to tailor the campaign mix to the client’s goals and to use consistent targeting and creative across channels for reinforcement. Walmart Connect’s omnichannel approach allows for a truly holistic retail media strategy, reaching Walmart customers wherever and whenever they shop.
Another major advantage of Walmart Connect – and one particularly valuable to agencies – is its robust measurement capabilities and partner ecosystem. Because Walmart can tie advertising exposure to actual transactions (both online orders and in-store sales via loyalty/account data), advertisers get closed-loop reporting on how ads translate into revenue. To make the most of this, Walmart Connect offers a range of in-house metrics and has also integrated with third-party measurement partners for additional insights.
Clayman explains that Walmart’s Partner Network now includes a category of Measurement Partners. These partners are independent tech or service providers that plug into Walmart Connect’s reporting APIs to deliver enhanced analytics, visualisations, or attribution studies. Working with a Walmart-approved measurement partner gives advertisers trusted third-party validation of performance and often richer analysis than the basic dashboard. The measurement partners span several specialties:
This rich measurement partner network means agencies can bring in their measurement vendor of choice to work with Walmart Connect, ensuring continuity with how they report on other channels. It “allows us to meet our customers where they are,” says Clayman – advertisers can use the solution that fits their needs while still tapping Walmart’s data. The takeaway for agencies is to leverage these partnerships to demonstrate clear ROI and deeper insights for their clients. For example, an agency might use a third-party lift study to prove that a client’s Walmart Connect campaign not only drove Walmart sales, but also lifted the client’s sales on their D2C site – a compelling result justifying greater investment.
Of course, Walmart Connect’s first-party measurement tools are evolving as well. Advertisers have access to robust in-platform reporting, and Walmart continues to roll out new metrics. One recent addition is in-store sales attribution for search ads, which provides visibility into how sponsored search campaigns online are influencing in-store purchases. Thanks to this, a brand can see if someone who clicked their ad later bought the product at a physical Walmart – bridging the online-to-offline gap. These omni-sales metrics help optimise campaigns by accounting for total sales impact, not just e-commerce.
Overall, Walmart Connect’s emphasis on measurement – both through closed-loop data and partner integrations – gives agencies the tools to prove the value of advertising on Walmart. The ability to concretely connect ad spend to incremental revenue (something historically challenging in media) is a strong selling point to brands and a differentiator for Walmart’s platform. Agencies should make measurement a centerpiece of their Walmart Connect strategy, setting up the right dashboards or partner tools from day one to track performance and optimise campaigns based on real sales outcomes.
Walmart Connect is rapidly evolving, and 2023-2024 brought several notable new features that agencies should be aware of. Clayman highlighted a few recent product updates that can help advertisers optimise campaigns and gain advanced insights:
Staying on top of these new features is essential for agencies to maintain an edge. Incorporating Target ROAS bidding can improve efficiency and hit client goals. Using incrementality data can refine strategy and demonstrate value. Tapping into the display API capability can enhance creative execution and consistency. And embracing omni-channel attribution ensures you’re optimizing with the full picture of ad impact. Walmart Connect is investing heavily in its platform, so agencies should regularly check for new tools and beta programs – they often provide an early mover advantage in delivering better results for clients.
When running Walmart Connect campaigns, one common pitfall is getting tunnel vision on a single metric like ROAS. Clayman advises agencies and brands to take a more nuanced view by aligning KPIs to the specific goals of each campaign and funnel stage. Walmart Connect provides a wealth of metrics, and the “right” ones to focus on will depend on what you’re trying to achieve:
In summary, agencies should match the metrics to the mission. If you’re running a branding campaign, don’t kill it just because the ROAS is low – look at reach and new customer acquisition. If you’re running a conversion campaign, don’t focus only on spend and sales – dig into how many of those sales were new buyers or truly incremental. Walmart Connect’s platform allows for tracking performance at each stage of the funnel, so taking a balanced scorecard approach will give clients a fuller picture of success. It also helps justify full-funnel investments: you can show awareness efforts leading to more efficient retargeting down the line, or demonstrate how upper-funnel tactics fill the pipeline for lower-funnel conversion. By educating clients on these metrics, agencies can set appropriate expectations and optimize campaigns in a more strategic, goal-oriented way.
Many agencies coming from Amazon or other platforms assume they can replicate the same playbook on Walmart and succeed. In reality, Walmart is its own ecosystem, and Clayman warns that “you can’t just copy and paste from other platforms.” Here are some best practices and tips for agencies to drive impact quickly and avoid common mistakes when transitioning clients to Walmart Connect:
By following these best practices – getting retail-ready, starting with search, expanding full-funnel, using Walmart’s data, and seeking partner support – agencies can avoid the trial-and-error and move faster toward winning on Walmart Connect. The Walmart ecosystem is a bit different from Amazon or other retail media, but with the right approach, it can become a highly lucrative channel for clients. And given Walmart Connect’s rapid development, those agencies who establish expertise now will be in a strong position to attract clients seeking help on Walmart in the coming years.
To sweeten the deal for brands (and the agencies who represent them) considering Walmart’s marketplace, Walmart has rolled out a New-Seller Savings program in 2025. If your clients are not yet selling on Walmart.com, this promotion offers significant incentives to join – effectively a “welcome package” that reduces the initial cost and encourages use of Walmart’s services, including advertising. The program, running through January 31, 2026, includes:
These incentives are subject to eligibility and are available upon successfully registering as a new seller on Walmart’s Marketplace during the promotional period. For agencies, this is a great “carrot” to present to prospective clients who haven’t ventured onto Walmart yet. The dramatically reduced fees and free ad credits de-risk the trial period on Walmart. An agency can say to a brand: “Not only is Walmart’s audience huge, but right now you’ll get thousands of dollars of value to test the waters.” It’s an opportunity to get ad campaigns running with minimal upfront cost, allowing the results to prove the case for further investment.
If you’re an agency professional looking to expand a client’s presence beyond Amazon, leveraging this promotion could be an excellent entry point – effectively giving the client a head-start on Walmart in terms of economics. Be sure to check out the official details on Walmart’s site (at marketplace.walmart.com/nss) and coordinate with your Walmart Connect rep or partner manager to ensure any new accounts take advantage of the program. The window runs until end of January 2026, so there’s still time (depending on when you’re reading this) to on-board brands and capitalize on these savings.
As Walmart Connect continues to surge in growth and innovation, it represents a unique and potent opportunity for agencies working with eCommerce brands. Harry Clayman’s insights illuminate how Walmart’s retail media platform combines the massive reach of the nation’s top omnichannel retailer with sophisticated advertising tools and data that drive real performance. For agencies, the message is clear: Walmart Connect is no longer optional – it’s rapidly becoming a must-have channel for brands seeking measurable ROI and new growth avenues. By leaning into Walmart Connect’s full-funnel solutions, agencies can diversify client ad spend and deliver results that truly “close the loop” between online media and in-store sales.
Equally important are the strategies and best practices that make Walmart advertising effective. From Clayman’s advice, agencies should remember to lay the groundwork with retail readiness, adapt their tactics to Walmart’s platform (rather than copy-pasting from elsewhere), and embrace a holistic approach that spans search, display, off-site, and in-store. With Walmart rolling out new features like AI bidding and incremental measurement, those who stay updated and leverage these tools early will gain an edge. The ability to attribute campaigns to every sale – whether on Walmart.com or in a brick-and-mortar aisle – means agencies can optimise and justify budgets in ways that delight clients. And with support from Walmart’s partner ecosystem and programs like the New-Seller Savings, getting started has never been easier.
For those inspired by Harry Clayman’s perspective, don’t let the conversation end here – feel free to connect with him on LinkedIn to follow his updates and insights. If your agency or brand is ready to elevate its Walmart Connect game, MerchantSpring’s platform can be your secret weapon – it combines Walmart Connect advertising and marketplace data into one dashboard, making analysis and reporting a breeze. You can 【schedule a personalised demo】 to see how MerchantSpring helps agencies excel on Walmart, Amazon, and other marketplaces. And before you go, be sure to check out our 【Watch On-Demand】 library for more expert interviews and actionable strategies from e-commerce leaders. Embrace Walmart Connect now, and empower your clients to ride the wave of Walmart’s retail media revolution.