Simon Halstead, VP exchange and supply international at Verizon Media, joins ExchangeWire's Mat Broughton and Lindsay Rowntree to discuss the latest news in ad tech and martech. In this episode they cover: Amazon's decision to block Google's FLoC from some of their websites; Apple's newly announced "Private Relay" and its impact on targeting; and the prediction that Amazon will become the UK's largest retailer by 2025.