Garrett McGrath, SVP of product at Magnite and board chair for Prebid, shares his expertise on the shifting landscape of ad tech. He discusses the implications of Google's Privacy Sandbox and the challenges posed by the deprecation of third-party cookies. The conversation reveals concerns over Google's market dominance and potential anti-competitive practices. McGrath also emphasizes the importance of navigating the regulatory scrutiny from the UK Competition and Markets Authority, ultimately questioning its impact on publishers and the broader digital ecosystem.