Walmart Inc.Walmart's increased onsite ad share and 38% ad business growth indicate strong demand for its advertising services.
Amazon and Walmart are shifting more of their retail-media advertising onto their own digital storefronts, placing sponsored products directly in front of shoppers close to buying. Amazon generated 56% of its retail-media impressions onsite during the first half of 2026, compared with 44% offsite, while Walmart increased its onsite share to 44%, up 27 percentage points from a year earlier. This contrasts with rivals like Best Buy and Target, which placed 93% and 92% of impressions offsite, respectively. The shift comes as total impressions across 32 U.S. networks fell 17% year over year to 223 billion, yet Amazon still controlled roughly 60% of those impressions. Amazon's second-quarter advertising-services revenue reached $19.8 billion, up about 26% from $15.7 billion a year earlier, while Walmart's global advertising business grew 38% last quarter, with Walmart Connect excluding Vizio jumping 43%. Investors should watch advertising revenue growth alongside e-commerce traffic and operating margins, but the risk is saturation from too many sponsored placements.
Walmart Inc.Walmart's increased onsite ad share and 38% ad business growth indicate strong demand for its advertising services.
Target CorporationTarget's offsite-heavy ad strategy contrasts with Amazon and Walmart's onsite shift, potentially losing ad relevance.
Amazon.com IncAmazon's onsite retail-media shift and 26% ad revenue growth indicate strong demand for its advertising services.
Best Buy Co. IncBest Buy's offsite-heavy ad strategy contrasts with Amazon and Walmart's onsite shift, potentially losing ad relevance.
Maplebear Inc.