https://techcrunch.com/2021/06/22/eu-is-now-investigating-googles-adtech-over-antitrust-concerns/

EU antitrust authorities are finally taking a broad and deep look into Google’s adtech stack and role in the online ad market — confirming today that they’ve opened a formal investigation.

Google has already been subject to three major EU antitrust enforcements over the past five years — against Google Shopping (2017), Android (2018) and AdSense (2019). But the European Commission has, until now, avoided officially wading into the broader issue of its role in the adtech supply chain. (The AdSense investigation focused on Google’s search ad brokering business, though Google claims the latest probe represents that next stage of that 2019 enquiry, rather than stemming from a new complaint).