Audience Extension: What It Is, Key Features, Benefits, Use Cases, and How It Fits in Programmatic Advertising
Audience Extension is a Paid Marketing approach for reaching people beyond your “known” audiences—such as site visitors, customers, or CRM lists—by using data-driven targeting to find additional users who look or behave similarly. In Programmatic Advertising, it’s the bridge between high-intent first-party audiences and scalable prospecting: you start with what you know, then extend reach through modeled, contextual, or marketplace signals.