Walmart: The Ad Platform That Happens to Sell Things

Walmart generated $4.4 billion in advertising revenue in fiscal 2024, growing 27% year-over-year, and this business now contributes nearly one-third of their total operating income, per their results last week.

Read that again, more than 1 in 4 dollars of profit is from media.

They're reshaping competitive dynamics across retail, advertising, and platform businesses. Beyond supplementary revenue, it's business model transformation disguised as advertising growth.

Walmart's advertising business operates at 70-80% gross margins compared to their traditional 4% retail margins. Put another way, each advertising dollar generates profit equivalent to $18-20 in traditional retail revenue.

We were watching a platform business emerge from inside a traditional retailer, following Amazon's playbook but with unique advantages even Amazon couldn't replicate.

While the industry conversation about retail media focuses on market share percentages and growth rates. That's surface analysis. The deeper strategic reality involves three systemic changes that favour Walmart's model over pure digital platforms:

First, the omnichannel advantage is becoming unassailable. Remember the narrative twenty years ago? "Walmart has a massive bricks-and-mortar problem. Those 4,700+ stores will become expensive liabilities as e-commerce dominates retail." Every analyst predicted physical retailers would be crushed by Amazon's asset-light model.

Instead, those stores became Walmart's most valuable strategic asset. Their 255 million weekly store visits now generate closed-loop attribution that connects digital advertising to in-store purchases—something even Amazon's sophisticated analytics cannot replicate. When marketers can measure online ad impact on offline behaviour at Walmart's scale, the value proposition becomes exponentially more compelling than traditional e-commerce attribution. What looked like legacy infrastructure became unassailable competitive advantage.

Second, marketplace competition dynamics favour Walmart. Amazon's 5+ million sellers create intense competition for advertising placement, driving up costs and reducing return on investment for individual brands. Walmart's 150,000 active sellers face less competition for attention, delivering better ROI for advertisers while maintaining high margins for Walmart.

Third, first-party data scarcity is becoming Walmart's strategic moat. Third-party cookie deprecation increases the value of first-party customer data. Walmart's weekly interaction with 150+ million customers provides unmatched behavioural insights that extend far beyond purchase history to include in-store browsing, seasonal patterns, and cross-category relationships. This data density creates advertising targeting capabilities that pure digital platforms cannot match.

The Vizio acquisition for $2.3 billion signals the strategic endgame: building a comprehensive advertising ecosystem spanning digital, physical, and television channels. No competitor possesses Walmart's combination of physical presence, customer frequency, and omnichannel integration capability.

Platform economics are reshaping competitive strategy across retail, but the implications extend far beyond Walmart's success. Three strategic patterns emerging from this transformation should influence your 2026+ planning:

Pattern 1: High-margin services within low-margin businesses become primary profit drivers. Walmart's advertising business contributing one-third of operating income despite representing less than 1% of revenue demonstrates this mathematical reality. Evaluate your own business: which high-margin services could you develop within existing customer relationships? The framework applies beyond retail to any business with scale customer interactions and data assets.

Pattern 2: Platform transformation follows predictable economics, not obvious technology adoption. Walmart succeeded because they focused on margin improvement and customer data monetisation, not because they built sophisticated technology first. The lesson: platform advantages emerge from economic model innovation, not just technical capability advancement.

Pattern 3: Physical assets become competitive advantages in digital businesses when properly leveraged. Walmart's stores provide attribution capabilities and inventory positioning that pure digital competitors cannot replicate. This reverses the conventional wisdom that physical assets represent legacy disadvantages in digital transformation.

Implementation guidance for marketing leaders: If you're developing retail media strategies, prioritise partners demonstrating platform economics (high margins, data exclusivity, network effects) over traditional advertising inventory (reach, frequency, cost efficiency). The next five years will separate platform businesses from advertising inventory providers, with dramatically different strategic and financial outcomes.

Prediction 1: Walmart's advertising revenue will reach $8-10 billion by 2028, maintaining 25%+ annual growth despite increasing scale. The economic advantages (margin structure, data assets, omnichannel attribution) create sustainable competitive differentiation that traditional advertising cyclicality won't disrupt. Track quarterly growth consistency and margin maintenance as validation indicators.

Prediction 2: Non-endemic advertiser adoption will accelerate dramatically in 2026. Financial services, automotive, and entertainment brands will begin shifting significant budgets to Walmart's platform as first-party data targeting capabilities become industry requirements. Monitor advertiser diversification beyond traditional CPG categories as the primary signal.

Prediction 3: Traditional retailers will attempt similar transformations but fail to achieve platform economics without Walmart's unique asset combination. Target, Kroger, and regional retailers lack either the scale, data density, or margin potential to replicate Walmart's success. Their advertising businesses will remain supplementary revenue rather than fundamental business model transformation.

Within five years, Walmart will likely join Meta and Google in the select group of platforms that can bypass traditional agency relationships but through a completely different strategic approach. While Meta and Google are working to disintermediate agencies by providing superior targeting and measurement tools, Walmart's path runs through omnichannel specialisation that most agencies cannot replicate.

Consider the expertise gap: Walmart's closed-loop attribution connecting online ads to in-store purchases, their understanding of inventory positioning impact on advertising effectiveness, and their ability to optimise campaigns based on real-time supply chain data represent capabilities that traditional agencies lack. The Luminate analytics platform already serves 90% of Walmart's largest suppliers directly. The Vizio acquisition adds connected TV expertise that few agencies possess.

Most importantly, Walmart controls the entire customer journey from digital discovery through physical fulfillment. This end-to-end ownership, combined with first-party data advantages and specialised omnichannel measurement, creates conditions where brands may find direct platform relationships more effective than agency-mediated ones.

By 2030, Walmart will source most of its profit from advertising, then they will officially operate as a platform business that happens to sell products rather than a retailer with advertising services. At nearly one-third contribution already, this represents the completion of platform transformation and creates entirely new competitive dynamics.

Brandflow is written by Justin Billingsley, who has spent his career on all three sides of the industry's table: senior client, global agency leader, technology founder. First published 28 August 2025 in the Brandflow newsletter on LinkedIn.