Google faces federal ruling as illegal search monopoly; judge to decide penalties by next summer. Potential breakup looms as Justice Department prepares remedy proposal.

Google faces a new lawsuit in Virginia alleging that the tech behemoth's dominance of online advertising amounts to a monopoly.

Prosecutors say Google's dominated the infrastructure that funds the flow of information on sites through over 150,000 online ad sales every second.

Google’s latest antitrust trial began Monday. It’s the tech giant’s second turn in the courtroom this year, and this time the issue at stake is its sprawling ad business. The US Department of Justice alleges Google operates an illegal monopoly over online advertising through Google Ad Manager,

Alphabet's Google will face antitrust prosecutors at trial on Monday in Virginia, where the U.S. Justice Department will seek to show the company stifled competition in online advertising technology.

Google faces its second major antitrust trial in less than a year on Monday, with the US government accusing the tech giant of dominating online advertising and stifling competition.