How 'Inventory Source to Low Priority Campaigns and Marketplace Connections' Logic Works

The following diagram and description are numbered in order to explain more easily how the second tier works when using an Inventory Source tag:


Follow the numbered items in the diagram with their corresponding explanations below:

  1. In essence, Inventory Sources (also known as INS), are domain lists of all your properties that include a set of criteria that define the main characteristics of the ad requests that will come from your sites. These criteria include ad request information such as:
    • Device type - Desktop, OTT, Mobile (App/Web) etc.
    • Publisher domains.
    • Browser/App
    • Player supported formats VAST or VPAID.
    • Etc.

Note: If an ad request is made from an unlisted domain or does not comply with your set criteria, the ad request will be filtered out and disregarded.

  1. After creating an Inventory Source within the Video SSP platform you will be able to generate an Inventory Source tag. This tag is a URL address that includes several query string parameters and values used to transfer information to the Video SSP platform when a player sends an ad request. The Inventory Source tag is then placed in an Oath or any 3rd party player that supports ad requesting (the arrow highlighted in blue).

  2. When the player on the publisher's site reaches an ad opportunity, it sends out an ad request to the Inventory Source tag (highlighted in black). This request includes important information such as the device type, opportunity type (Pre/Mid/Post-Roll) and other important information for the Inventory Source to evaluate.
    If the ad request matches all the Inventory Source criteria it will pass the request any matching Low priority Campaign and Marketplace Connection.

  3. The system will then search for any low priority Campaigns (priority 11) that are targeted specifically to the requesting Inventory Source. If a matching Campaigns are found, they will compete together with the matching Marketplace Connections.

  4. The system will also search for all Marketplace Connections that match the ad request and Inventory Source criteria. If the ad request matches all of the criteria defined in the Marketplace Connection, the request is then passed to any of the assigned Marketplaces linked to the relevant connection.

    Note: Contrary to Marketplace Connection tags, Inventory Source tags can potentially link to multiple Marketplace Connections. Additionally, Marketplace Connection can be linked to more than one Marketplace environment, allowing the ad request to be offered for sale in multiple places. 

    All the eligible requests (both P11 Campaigns & Marketplace Connections) compete together.
    Once the ad opportunity has been sold to the highest bid, an ad response is sent all the way through the chain back to the player with an advertisement to be displayed.


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