The U.S. Department of Justice filed suit against Google on Tuesday, alleging the company unlawfully maintained a monopoly in search and search advertising. The antitrust action was the most significant since the DOJ's case against Microsoft, and is sure to send ripples through Silicon Valley where Facebook, Apple, and Amazon will be paying close attention since they might be next.

To talk about what it all means, Yelp's senior vice president of public policy Luther Lowe joined the Big Technology Podcast on extremely short notice. Lowe has been pushing the case against Google forward for years, and his on the ground perspective can help shed light on what's at stake and what comes next.