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: Advertisers and publishers agree on a fixed Cost Per Mille (CPM) before the campaign goes live.

: It replaces traditional manual processes, such as phone calls, emails, and physical Insertion Orders (IOs), with automated software for trafficking and reporting.

Get started with Programmatic Direct - Google Ad Manager Help

: Publishers often reserve their most exclusive or high-performing inventory (e.g., homepages or niche newsletters) for direct buys rather than selling it on open markets. Types of Programmatic Direct Deals

: Unlike open exchanges, PDB involves a direct deal between a single buyer and a single publisher.