Walmart Eyes CTV, AI Agents and Self-Service to Supersize Its Ad Business
Walmart has laid out a plan to push advertising far beyond retail search - leaning on its VIZIO acquisition for connected TV, its 'Sparky' AI shopping agent, and a shift to self-service buying - as it builds a Trade-Desk-scale ad platform on top of its stores and TVs.
The Plan
Speaking at Goldman Sachs' Communacopia conference, Walmart detailed how it will broaden advertising beyond retail: its completed VIZIO acquisition for connected TV, its 'Sparky' AI shopping agent, and a move from managed service toward self-service buying tools and APIs.
The scale is notable. VIZIO's operating system, now on Walmart's onn TVs, became the leading US smart-TV OS in the first half of 2026, with DSP partners including Magnite, Yahoo, YouTube, Meta and TikTok. Sparky's weekly active users doubled year on year, and Sparky-assisted trips carry a 40% higher average order value.
Why It Matters
Walmart is openly building a full-stack ad platform on top of its stores and its televisions. Retail media's next front is not just sponsored search on the shelf - it is connected TV plus agentic shopping, with the retailer owning both the screen and the checkout.
The economics explain the ambition. Walmart's self-service model spans advertisers from $1,000 a month to $10m a month, and ad margins exceed 70% versus roughly 5% for core retail. Advertising is how a thin-margin retailer becomes a high-margin media owner.
Marketing Minute's Take
For advertisers, the takeaway is that retail media is graduating from a search line item into a full media ecosystem with its own CTV inventory and AI shopping surfaces. The brands that treat Walmart as a media platform, not just a shelf, will get first access to that data and reach.
The strategic question for every advertiser is data leverage. When the retailer owns the screen, the assistant and the till, it holds unmatched closed-loop measurement - powerful, but concentrating. Use it, but keep building your own first-party data so you are never wholly dependent on one platform's numbers.
Quick FAQ
What is Walmart's advertising strategy?
Walmart is expanding ads beyond retail search into connected TV via its VIZIO acquisition, its 'Sparky' AI shopping agent, and self-service buying tools, building a full-stack media platform.
How profitable is Walmart's ad business?
Ad margins exceed 70% versus roughly 5% for core retail, and its self-service model serves advertisers from $1,000 to $10m a month, making ads a major profit engine.
Why does Walmart's CTV push matter for marketers?
It signals retail media is becoming a full ecosystem spanning CTV and AI shopping with closed-loop measurement, so brands should treat Walmart as a media platform, not just a shelf.
When one company owns the TV screen, the shopping assistant and the checkout, it owns the whole customer journey - and the measurement that goes with it. That is powerful and worth using. Just never let it replace the first-party data that keeps you independent of any single platform's numbers. - Daniel Nikolla, Founder of Merx Marketing
Retail media is graduating into a full CTV-plus-AI ecosystem - treat Walmart as a media platform, but keep building your own first-party data so you are never wholly dependent on it.
Are you treating retail media networks as a shelf, or as the full-funnel media platforms they are becoming?
If you would like to know more about this topic, please contact us on danieln@merxmarketing.co.uk
Sources: Yahoo Finance, Investing.com.
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Written by Daniel Nikolla, Founder of Merx Marketing Ltd and Marketing Minute
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