A federal judge dismissed the Justice Department’s attempt to break up Google’s dominant online advertising business on Wednesday. This marks the second legal defeat for the government in its efforts to dismantle the tech giant, following a previous ruling finding Google liable for anticompetitive practices. The lawsuit alleged Google illegally maintained a monopoly through a series of acquisitions and exclusionary contracts. However, the judge determined the government failed to demonstrate that a breakup would restore competition. The ruling is a significant victory for Google, allowing it to retain control over a crucial part of its revenue stream. The Justice Department may appeal the decision, continuing the legal battle over Google's market power.