The world's largest adtech companies are: Google, with its advertising platforms like Google Ads and AdSense, is a dominant player in the adtech industry; Facebook (now Meta), owns a significant share of the digital advertising market through its platforms (Facebook, Instagram, WhatsApp, and Messenger); Amazon has a growing advertising business, with its Amazon Ads and demand-side platform, allowing businesses to promote their products on the Amazon marketplace; The Trade Desk, an adtech company that provides a platform for media buying; Criteo, a global technology company that specializes in performance marketing and advertising solutions.