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`wseat`, `wadomain`, and `pmp.private_auction` are optional OpenRTB bid request attributes that afford inventory sellers the ability to selectively offer their supply to specific buyers.

In the `wseat` attribute, sellers have the option to declare eligible seat IDs for a given programmatic auction. `wadomain` allows sellers to declare eligible advertiser domains. Both enable eligible demand to transact on and win impressions for a given RTB auction. With `wseat` and 'wadomain` the programmatic seller can reduce the inefficiencies of blocked programmatic demand and eliminate bid responses ineligible for an impression.

How it Works

Within Beeswax, a buyer’s use case for wseat include:

• Media firms that buy their own exclusive supply and do not want other buyers bidding on it
• Ensuring that bidding on programmatic guaranteed supply is restricted to only the appropriate buyer

For non-private deals where `pmp.private_auction=0`, `wseat` and `wadomain` are respected. If a bidder bids on a request and the bidder does not have a matching `wseat` and/or `wadomain` that is present in the bid request, the bid will be dropped. 

For open marketplace buying, `wseat` is only supported on certain exchanges. If a deal is carried on the same bid request and has a different `wseat` than the open market auction, the `wseat` on either the deal or the open market aspect of the bid request will be respected. Please contact Beeswax support to understand Beeswax’s support for `wseat` on open marketplace transactions by exchange.

If you are working with an inventory seller for exclusive supply where `wseat` is required, please contact Beeswax Support to ensure your Beeswax account is configured with the proper SSP-specific seat ID. 

Example:

A Beeswax buyer strikes a deal with a publisher who sells their supply programmatically but only to a subset of DSP demand. The publisher has a requirement that no ineligible buyer should bid on the deal. The publisher can reference the Beeswax buyer’s SSP seat ID within the `wseat` RTB attribute, which effectively removes unknown buyers from the pool of eligible DSP demand.