Retail Media Advertising for CPG Brands: How to Run Walmart Connect, Target Roundel, and Amazon Ads

For context on which platform to prioritize based on your distribution, see our guide on the best CPG and food and beverage marketing agencies in 2026.

What Retail Media Advertising Is and Why CPG Brands Are Running It

Retail media advertising is paid placement on a retailer’s owned platform, targeted using that retailer’s first-party purchase data. When your product runs a Walmart Connect Sponsored Products campaign, the targeting draws on verified Walmart purchase history, not inferred social interests.

That is a fundamentally better signal for CPG. A shopper who has bought in your category at Walmart in the last 60 days is infinitely more qualified than someone who liked a grocery brand on Instagram.

US retail media ad spending is projected to grow 17.8% year over year in 2026, outpacing both social network and search ad spending growth (eMarketer). Amazon dominated with 79.7% of the US retail media market in 2025, with Walmart Connect second at 8.0% and Target Roundel at 1.5% (eMarketer). That concentration matters for CPG brands deciding where to invest. Amazon is the dominant volume play. But Walmart Connect, Target Roundel, and Instacart each serve purchase moments that Amazon does not reach.

How to Run Amazon Advertising Campaigns for CPG Brands

Getting Access to Amazon Advertising

Amazon has two primary routes for CPG brands: Seller Central (for brands selling directly on Amazon as third-party merchants) and Vendor Central (for brands that sell wholesale to Amazon, which then resells). Both unlock Amazon Advertising, though Sponsored Display and Amazon DSP require either an active Vendor Central relationship or an advertising partner.

If your brand is not currently sold on Amazon, advertising there is not an option. Sponsored Products and Sponsored Brands require active product listings.

Amazon Ad Types for CPG

For most CPG brands starting on Amazon, the right sequence is Sponsored Products first to capture in-category demand, Sponsored Brands once you have multiple SKUs and a brand story, Sponsored Display for retargeting, and DSP once you have the budget and a measurement framework to evaluate it honestly.

Budget and ACOS Benchmarks

Advertising Cost of Sale (ACOS) is Amazon’s primary CPG performance metric: ad spend divided by attributed sales. Food and grocery is one of the most efficient categories on the platform: Ad Badger’s cross-account benchmark data puts average ACOS for food and grocery at about 21%, against a roughly 30% average across all categories (Ad Badger). Your number will move with category competitiveness, review count, and price point. Supplements, protein, and coffee run higher because the auctions are more competitive and CPCs are elevated.

A practical starting budget for Sponsored Products: $2,000 to $5,000 per month per product line to gather data you can actually optimize from. Below that, the auction dynamics give you too thin a signal.

How to Run Walmart Connect Campaigns for CPG Brands

Getting Access to Walmart Connect

Walmart Connect is accessible through the Walmart Ad Center at advertisinghelp.walmart.com. Brands log in with Supplier Center or Seller Center credentials. If you do not have either, you need to be an active Walmart supplier or work through a registered advertising partner. Most Sponsored Products and Sponsored Brands campaigns are now fully self-serve through the Ad Center.

Walmart Connect Ad Types for CPG

The standout Walmart Connect capability for CPG: it measures both online and in-store sales. A Sponsored Products campaign can show whether it drove Walmart.com purchases and in-store or pickup conversions, which most other retail media platforms cannot track cleanly.

Walmart Connect Budget and CPC Benchmarks

Walmart Connect CPCs run significantly lower than Amazon’s, typically $0.40 to $0.80 per click for CPG categories versus Amazon’s $1.30 to $1.50 (RMIQ’s Walmart Connect advertising guide). That efficiency reflects Walmart’s earlier stage in the retail media auction market.

Self-serve Sponsored Products campaigns carry a $100 minimum daily budget and a $1,000 minimum monthly spend. Onsite Display runs higher: the same RMIQ guide pegs the practical threshold around $4,500 per campaign per month.

One practical note: the Walmart Ad Center is less intuitive than Amazon’s campaign manager. Expect a learning curve on keyword management and bid optimization in the first 30 to 60 days, particularly for brands used to Amazon’s more mature tooling.

How to Run Target Roundel Campaigns for CPG Brands

Access Requirements for Target Roundel

Target Roundel is not fully self-serve. To access most Roundel placements, brands work through a Target-approved advertising agency or establish a direct relationship with Target’s Roundel commercial team.

The practical threshold: Roundel is built for brands doing meaningful revenue in Target stores. It amplifies existing Target distribution; it does not help you enter Target. If your brand has limited Target shelf placement, Roundel spend will not move the needle.

What Target Roundel Covers

Core Roundel formats for CPG:

• Target Product Ads: Sponsored placements within Target.com and the Target app category search results.

• Roundel Display: Audience-targeted display on Target-owned properties and off-site via data partnerships.

• Search Ads by Roundel: Google Search inventory targeted using Target’s first-party purchase data. This lets you reach shoppers on Google who have bought in your category at Target.

• Streaming TV: CTV inventory using Target Circle loyalty data for household-level targeting.

Target’s first-party data quality is genuinely high. Target Circle and the Target app generate detailed purchase history, category affinity, and behavioral signals. For better-for-you CPG, premium snacks, and household brands positioning against health attributes, Roundel’s audience precision is worth the higher access bar.

When Target Roundel Makes Sense vs. When It Does Not

Roundel makes sense when your product has active Target distribution, your category buyer skews toward Target’s demographic (younger, higher household income, wellness-oriented), and you can commit at a meaningful level, typically $50,000 or more annually.

Roundel does not make sense for brands just entering Target, products in only a handful of test DMAs, or teams looking for a self-serve platform to test with a small budget.

How to Run Instacart Ads for CPG Brands

Instacart Ads is the most accessible major retail media platform for smaller CPG brands. There is no minimum spend for Sponsored Products, and the self-serve interface is straightforward relative to Amazon or Walmart Connect.

The differentiator: Instacart shoppers are building a grocery basket in real time. A Sponsored Product placement appears at the moment of active purchase decision, which is as high-intent as CPG digital advertising gets. For categories with strong grocery delivery penetration, beverages, household staples, baby, and pet, this placement is hard to replicate.

Instacart also lets brands layer in digital offers directly on ad placements via its Eversight integration, which is useful for trial-driving periods where a first-purchase discount accelerates sampling.

Instacart works best as a complement to Amazon and Walmart, not a replacement. Its reach is high-intent but narrower in total volume.

Platform Comparison: Setup Requirements and Minimum Spend

How to Measure Retail Media Performance in CPG: Velocity Over ROAS

Platform ROAS is the wrong primary metric for CPG retail media. Amazon’s attribution window is 14 days. Walmart and Target use different windows. None match Meta’s 7-day click window. They are not comparable to each other and not comparable to your DTC paid social ROAS.

More importantly, in-platform ROAS conflates incremental sales with purchases that would have happened anyway. Retail networks take full attribution credit for any sale inside the window, a practice media buyers have publicly flagged as overstating true impact (Digiday). A well-run incrementality test will almost always come back below the dashboard number. That gap is not a platform failure. It is the difference between attribution and causation.

The metric that actually matters for CPG: velocity at shelf. Units per store per week (UPS/W) is the number that drives planogram conversations with buyers. If a Walmart Connect campaign supports a promotional event and UPS/W goes up in activated markets versus control markets, that is the right signal, regardless of what the platform ROAS dashboard shows.

Practical measurement approach:

• Request a lift study. Amazon Attribution, Walmart Brand Lift, and Roundel Measurement Suite all offer one quarterly at no added cost. Run it.

• Run a geo holdout for major campaigns. Activate in half your distribution markets, hold the other half dark, compare sell-through velocity over 4 to 6 weeks.

• Pull sell-through data from the retailer portal (Retail Link for Walmart, Partner Online for Target) alongside your ad platform data. If impressions went up but velocity did not move, the targeting or creative needs to change.

The independent research points the same direction. Criteo’s analysis of its 2024 to 2025 retail media data found that shoppers exposed to both display and sponsored products generated 3.2x more revenue per user than shoppers who saw sponsored products alone, and brands that raised retail media spend by more than 10% saw organic sales grow 4.7% in the Americas (Criteo). Those are observational reads, not controlled experiments, which is exactly why the lift studies and geo holdouts above are worth the effort.

Syncing Retail Media with Your Trade Calendar

Retail media works best when it is synchronized with your trade marketing activity, not run as a separate budget line by a different team.

If Target is running an in-store endcap for your brand in Q3, Roundel spend in the 2 weeks before and during that event amplifies the physical activation. Shoppers who see your Target.com ad and then find your product on an endcap convert at higher rates than either touchpoint alone. Running them on separate calendars leaves that lift on the table.

The same logic applies to Amazon and Walmart. If you have a price promotion live on the retailer’s site, Sponsored Products bids should increase during that window to capture the additional search demand the deal generates. Brands that synchronize retail media bids with their promotional pricing see lower ACOS during deal periods because the higher conversion rate reduces the effective cost per click.

We have seen CPG brands treat retail media and trade marketing as completely separate budget lines managed by different teams with no shared calendar. When we bring those views together, there is almost always overlap, wasted spend, and missed amplification opportunities. Getting that coordination right is harder than the media execution, but it is where the real yield improvement comes from.

For a broader view of how CPG brands structure their shopper marketing spend, see our CPG shopper marketing playbook.

Frequently Asked Questions About Retail Media Advertising for CPG Brands