Bree has set up a campaign in the Amazon DSP which utilizes a deal ID. What supply is she leveraging?

A deal ID is a unique identifier used to facilitate programmatic ad buying through Private Marketplaces (PMPs). PMPs are invitation-only marketplaces where publishers offer their ad inventory to a select group of buyers at negotiated prices. The deal ID ensures that Bree's campaign can access this specific, pre-arranged inventory. Amazon O&O properties refer to Amazon's owned and operated websites and apps (e.g., Amazon.com, IMDb), which are typically accessed directly or through Amazon's proprietary ad server, not primarily via deal IDs. Third-party exchanges are open marketplaces where ad inventory is bought and sold via real-time bidding, often without specific deal IDs unless it's a private auction within the exchange. Amazon Publisher Services (APS) is Amazon's suite of services for publishers to monetize their inventory, including header bidding, but a deal ID specifically points to a PMP arrangement, not APS itself as a supply source.