Google’s digital ad business is the latest DOJ antitrust tech target

The Justice Department and states including California, New York, Colorado and Virginia filed a lawsuit against Google alleging the search and advertising behemoth illegally monopolized the market for online ads through a yearslong practice of self-dealing, anticompetitive acquisitions, and forcing businesses to use multiple products and services that it offers.

The Justice Department and states are accusing Google of illegally monopolizing the roughly $250 billion U.S. market for digital ads. The complaint attacks Google’s conduct in the services it sells to advertisers and publishers and is seeking a break up of the...