In the fast-paced and evolving landscape of advertising, Retail Media Networks (RMNs) have emerged as a beacon of innovation and efficiency, fundamentally reshaping the way brands connect with their consumers. Dominated by behemoths such as Amazon Advertising, Walmart Connect, and Kroger Precision Marketing, RMNs offer access to consumer insights through first-party data, allowing for personalized targeting at a scale previously unimaginable. In 2022 alone, Amazon Advertising commanded a staggering 75% market share with revenue reaching $37.7 billion, underscoring the colossal impact of RMNs in the advertising ecosystem.