devicetype 8 means OOH Device

A digital out-of-home screen. It is not in OpenRTB 2.5's table and comes from the AdCOM list.

List: Device TypesValue 8

When to send it

Send 8 for a digital out-of-home screen: a billboard, a transit display, or a screen in a store or waiting room. The value is not in OpenRTB 2.5's device type table; it lives in the AdCOM list that OpenRTB 2.6 references. Since 2.6-202211, out-of-home requests describe the venue in BidRequest.dooh instead of site or app, and can state an impression multiplier in Imp.qty.

Buyers use 8 to route the request to out-of-home campaigns, which often price per play or per audience impression rather than per device and read the venue and multiplier fields before bidding. It is most often confused with 3, because many venue screens are ordinary televisions. The test is how the inventory is sold: a television in a venue sold through out-of-home channels is 8.

Example

{
  "device": {
    "devicetype": 8
  }
}

Fields that carry it

Other values in device types

ValueName
1Mobile/Tablet - General
2Personal Computer
3Connected TV
4Phone
5Tablet
6Connected Device
7Set Top Box

The device types list page explains the whole list and its common mistakes.