Amazon challenges Google and Facebook's hold on digital ad market
Congress grilled Mark Zuckerberg regarding not just Facebook's proposed new cryptocurrency Libra but also whether the socal media giant was doing enough to combat fraudulent political ads in the upcoming election. (Al Drago/Bloomberg)
WPP Media has issued a report attacking the quality of desktop and mobile inventory sold via Publicis Groupe's Epsilon SSP, a rarity even among industry rivals.