Compatibility: Placement compatibility. DISPLAY and DISPLAY_INTERSTITIAL refer to rendering on desktop, on mobile devices or in mobile apps for regular or interstitial ads respectively. APP and APP_INTERSTITIAL are no longer allowed for new placement insertions. Instead, use DISPLAY or DISPLAY_INTERSTITIAL. IN_STREAM_VIDEO refers to rendering in in-stream video ads developed with the VAST standard. This field is required on insertion.
"APP" "APP_INTERSTITIAL" "DISPLAY" "DISPLAY_INTERSTITIAL" "IN_STREAM_VIDEO"