Placement positions value 1 means Above The Fold

When to send it

Use 1 for a slot that renders inside the initial viewport of the requesting device. On responsive sites the fold moves with screen height, so the honest answer for one tag can differ between a desktop request and a phone request; compute it per request when you can. It is carried in Banner.pos, and an outstream or in-article player that loads in view belongs in imp.video.pos with the same value.

Buyers read 1 as a strong viewability prior and some bid more for it, then compare it with what their measurement vendor reports. It is confused with 4 (Header), which describes the slot's region of the layout rather than the fold, and with 7 (Fullscreen): an interstitial covers the whole screen and should be labeled 7, not 1.

Example

{
  "imp": [
    {
      "banner": {
        "pos": 1
      }
    }
  ]
}

Fields that carry it

• imp.banner.pos
• imp.video.pos

Other values in placement positions

The placement positions list page explains the whole list and its common mistakes.