Retail Media · Strategy · Measurement
The Future of Retail Media Will Be Built on Proof,
Not Inventory
Retail media has grown quickly in part because the category entered the market with real strengths.
-Retailers have customer proximity.
-They have a commerce context.
-They have transaction visibility.
-They have vendor relationships.
-They have owned environments that brands want to access.
That is a powerful combination. The next phase of the market will demand something more than access and inventory. It will demand proof.
This is where I think the retail media conversation is going.
In the early stages of category growth, the market can tolerate considerable experimentation. New networks emerge. Demand rises. Brands want presence. Retailers rush to define offerings and monetize available surfaces. Momentum itself creates confidence. But that is not the same thing as maturity.
As the category develops, pressure naturally increases. Vendors become more selective. Internal retail stakeholders ask harder questions. Finance teams expect a more defensible business case. Merchant organizations want clearer connections to product and category performance. And executive leaders start to distinguish between RMN activity and RMN value.
That transition is already visible in the market. McKinsey estimates RMNs will capture more than $100 billion in US advertiser spending by 2029, while broader commerce media growth slows from roughly 20% CAGR over the past three years to 14% over the next three. That is exactly what maturing categories look like: real scale, but less tolerance for weak operating models.
That is the point where proof starts to matter more than inventory volume.
A traditional retail media mindset tends to optimize for scale:
-More placements
-More sponsored opportunities
-More campaigns
-More yield
A more mature mindset starts asking different questions:
-What changed in customer behavior?
-What business effect followed
-What vendor value was created?
-What can be repeated with confidence?
-Which capabilities actually make the network stronger over time?
That is a deeper strategic model, and in my view, it is where the strongest RMNs will set themselves apart.
The future winners in retail media will not simply be those with the most ad space to sell. They will be the ones that can connect media performance to transaction truth, customer response, merchant relevance, and business outcome in a way that holds up under scrutiny.
That requires a shift in how RMN is designed. It cannot remain only a monetization layer. It has to become a commercial intelligence layer.
That means bringing together media activity, transaction insight, vendor performance, customer behavior, and outcome measurement in a more connected operating model. It means building a retail media capability that the broader business can support because the value is clearer, the logic is stronger, and the proof is more durable.
That is a different ambition than simply growing ad revenue. It is also a better one, because in the long run, credibility compounds. Further, in a category built on both commerce and media, credibility may be the most important asset of all.
Source note: McKinsey, Commerce media at an inflection point: How to win with a full-stack approach (Mar. 2, 2026).
-Retailers have customer proximity.
-They have a commerce context.
-They have transaction visibility.
-They have vendor relationships.
-They have owned environments that brands want to access.
That is a powerful combination. The next phase of the market will demand something more than access and inventory. It will demand proof.
This is where I think the retail media conversation is going.
In the early stages of category growth, the market can tolerate considerable experimentation. New networks emerge. Demand rises. Brands want presence. Retailers rush to define offerings and monetize available surfaces. Momentum itself creates confidence. But that is not the same thing as maturity.
As the category develops, pressure naturally increases. Vendors become more selective. Internal retail stakeholders ask harder questions. Finance teams expect a more defensible business case. Merchant organizations want clearer connections to product and category performance. And executive leaders start to distinguish between RMN activity and RMN value.
That transition is already visible in the market. McKinsey estimates RMNs will capture more than $100 billion in US advertiser spending by 2029, while broader commerce media growth slows from roughly 20% CAGR over the past three years to 14% over the next three. That is exactly what maturing categories look like: real scale, but less tolerance for weak operating models.
That is the point where proof starts to matter more than inventory volume.
A traditional retail media mindset tends to optimize for scale:
-More placements
-More sponsored opportunities
-More campaigns
-More yield
A more mature mindset starts asking different questions:
-What changed in customer behavior?
-What business effect followed
-What vendor value was created?
-What can be repeated with confidence?
-Which capabilities actually make the network stronger over time?
That is a deeper strategic model, and in my view, it is where the strongest RMNs will set themselves apart.
The future winners in retail media will not simply be those with the most ad space to sell. They will be the ones that can connect media performance to transaction truth, customer response, merchant relevance, and business outcome in a way that holds up under scrutiny.
That requires a shift in how RMN is designed. It cannot remain only a monetization layer. It has to become a commercial intelligence layer.
That means bringing together media activity, transaction insight, vendor performance, customer behavior, and outcome measurement in a more connected operating model. It means building a retail media capability that the broader business can support because the value is clearer, the logic is stronger, and the proof is more durable.
That is a different ambition than simply growing ad revenue. It is also a better one, because in the long run, credibility compounds. Further, in a category built on both commerce and media, credibility may be the most important asset of all.
Source note: McKinsey, Commerce media at an inflection point: How to win with a full-stack approach (Mar. 2, 2026).