What Programmatic Advertising Is and Why It Matters

This lesson defines programmatic advertising as the automated buying and selling of digital ad impressions using software, data, and auction-based decisioning. It explains why programmatic changed media buying: campaigns can evaluate each impression individually, apply audience and context signals, adjust bids, and measure outcomes faster than traditional manual buying.

The lesson stays focused on the big picture: what happens during a programmatic transaction, who participates, what benefits the model creates, and what tradeoffs marketers must manage. Later lessons will go deeper into platforms, auction mechanics, audience data, measurement, privacy, fraud, and optimization.