Google used its monopoly power to artificially raise ad prices for years. That could cost it $100 billion or more.

Justin Sullivan/Getty

• Advertisers could hit Google with a class-action lawsuit, a top analyst has warned.
• A judge ruled Google broke antitrust law and artificially inflated ad prices.
• Google could face more than $100 billion damage claims from advertisers, analyst estimated.

Google used its illegal monopoly to artificially raise ad prices for years. That could end up costing the tech giant more than $100 billion, according to a top analyst.