There was a time when the Chief Marketing Officer ran campaigns. They managed the brand calendar, oversaw the agency relationships, approved the creative, and reported on impressions and reach at the quarterly all-hands. That job still exists. It's just not the one that matters anymore. The CMO role has undergone a fundamental shift — driven by AI-powered attribution, real-time performance data, and the increasing complexity of the buyer journey. Marketing is no longer a support function. It's a growth engine. And the executives running it are no longer managing campaigns. They're shaping revenue strategy, owning pipeline, and sitting at the table where the decisions that actually move the business get made.