EU proposes breaking up Google's ad business over antitrust concerns.

European Union regulators have issued a preliminary finding that Google must sell off some of its lucrative digital advertising business, part of a sweeping antitrust complaint targeting one of the search giant’s most important revenue drivers. The EU competition regulators alleged that Google favors its own technology services to the detriment of competitors, an abuse of its dominant position in online ad sales. The move against Google is part of an expansive campaign by European authorities to limit the power of the big U.S. technology companies.