The UK CMA opens a probe to assess Google's position in search and search ads business and how it impacts consumers, advertisers, publishers, and its rivals (Ryan Browne/CNBC)

Ryan Browne / CNBC:
The UK CMA opens a probe to assess Google's position in search and search ads business and how it impacts consumers, advertisers, publishers, and its rivals  —  Britain's competition watchdog on Tuesday said that it's opening a formal antitrust investigation into Google's search and search advertising services.