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

A deal ID is a unique identifier used to access a Private Marketplace (PMP). PMPs are exclusive programmatic deals between a publisher and one or more advertisers, offering guaranteed inventory at negotiated prices, often with enhanced targeting or premium placements. Amazon Publisher Services (APS) is a suite of publisher solutions, not a type of supply itself, though it facilitates PMPs. Amazon O&O (Owned and Operated) properties refer to Amazon's own websites and apps (like Amazon.com, IMDb), which are a type of supply, but a deal ID specifically points to a PMP, which can include O&O inventory but isn't limited to it. Third-party exchanges are open marketplaces where inventory is bought and sold via open auction, not typically through a specific deal ID for exclusive access.