Amazon’s Outcome Optimizer Redirects Ad Dollars Based on $50B+ Shopping Data

For retailers and brands selling on Amazon, the blurring line between media and commerce just got sharper: ads on Twitch, Fire TV, or iHeart podcasts can now be automatically tied to product sales on the marketplace. With 1,000-plus iHeart sellers pushing that inventory, brands of all sizes can activate Amazon’s purchase-based optimization without deep ad-tech expertise.

Amazon is making a concerted push to embed itself at the heart of digital advertising, simultaneously expanding its sales muscle through a deepened partnership with iHeartMedia and launching a measurement tool that directly ties streaming ad exposure to purchase behavior. The dual announcement—iHeartMedia’s 1,000-plus seller network now resells inventory across Twitch, Amazon Music, Fire TV, and Alexa, and the rollout of Outcome Optimizer for programmatic guaranteed campaigns in Freewheel—signals Amazon’s ambition to become the indispensable intermediary between premium publishers and performance-driven advertisers.

“

Amazon’s ad business—now a $50-billion-plus annual revenue stream—has historically been dominated by sponsored product ads on its own marketplace.

iHeartMedia has been reselling Prime Video ad slots for three years, but the newly broadened deal transforms a transactional relationship into a strategic data collaboration. For the first time, iHeart’s clients gain access to Amazon’s shopping, browsing, and streaming signals to target audiences across iHeart’s digital ecosystem—including its massive podcast network, streaming audio, and creator-led content. This effectively turns iHeartMedia’s sales force into an extended Amazon Ads team, one that can now pitch closed-loop attribution as a core differentiator. Mike Biondo, iHeartMedia’s president, noted that the shared data can improve renewal and retention rates for advertisers, though neither party disclosed the financial terms. For iHeart, gaining access to Amazon’s rich consumer data is transformative: it allows the radio-and-podcast giant to compete more aggressively against pure-play digital platforms by proving that its inventory drives real-world sales.

Simultaneously, Amazon’s Publisher Cloud is introducing Outcome Optimizer, a tool that leverages Amazon’s first-party data—shopping patterns, browsing history, streaming behavior—to dynamically optimize programmatic guaranteed campaigns within Comcast-owned Freewheel. At launch, Warner Bros. Discovery and A+E Global Media are using the tool, which represents a new frontier in television ad measurement. Unlike traditional age-and-gender demos or panel-based attribution, Outcome Optimizer offers advertisers the ability to continuously reallocate spend toward audiences most likely to convert, based on actual purchase signals from the Amazon ecosystem. Sharmilan Rayer, director of Amazon Publisher Cloud, emphasized that the strategy is to work directly with premium publishers, using technology as a bridge so that advertiser objectives translate into superior results on partner platforms.

These moves fit into a multi-year pattern: Amazon is systematically building an advertising infrastructure that leverages its unique e-commerce data moat. Amazon’s ad business—now a $50-billion-plus annual revenue stream—has historically been dominated by sponsored product ads on its own marketplace. But with Prime Video’s ad-supported tier, Freevee, Twitch, and now iHeart’s audio inventory, Amazon is expanding its premium video and audio footprint, competing directly with the likes of Google’s YouTube, TikTok, and traditional TV networks. By placing thousands of iHeart sellers behind this inventory, Amazon lowers the barrier for mid-market and brand advertisers who may not have direct relationships with Amazon Ads. Simultaneously, Outcome Optimizer provides a measurement layer that justifies premium CPMs for CTV and audio inventory—a chronic pain point for the industry.