Next in Marketing spoke to Insider Intelligence Principle Analyst Andrew Lipsman about what he sees as "the Third Wave" in digital advertising. Following upon the masssive category launches we've seen over the past two decades- first search and social - retail media is set to become a $45 billion category. That said, not every retailer is likely to be able to manage these businesses on their own, given how dominant Amazon, Walmart and a few other players have become. Lipsman predicts partnership and ad tech rollups as this category continues to surge in 2023.