Some Buyers request or require certain fields be sent to them that are above and beyond the normal IAB specification. This usually indicates fields that they deem important and thus including them will increase their interest in your inventory.

Required or Recommended fields

DV360

• native.request.eventtrackers.event with value 1 (Required)

• native.request.eventtrackers.methods with values [1,2] (Required) JavaScript-based tracking: If a placement supports JavaScript-based tracking, it should indicate support for it with an EventTracker object with event = 1 (impression) and method = 2 (js). Note that this should be used even for viewability trackers. You can read more on DV360’s Native Inventory Page

• native.request.plcmttype (recommended) If you do not populate this attribute, it will be shown as unknown in the product and may limit demand.

source.tid (Required) Transaction ID that must be common across all participants in this bid request (e.g., potentially multiple exchanges), see the Source Object section for more details.