AdDeferReason

AdDeferReason = 'not-visible' | 'tab-hidden' | 'lazy' | 'not-viewable' | 'awaiting-trigger'

Reason a request is waiting.

not-visible: the placement element is hidden
tab-hidden: the browser tab is in the background
lazy: waiting for the placement to scroll near the viewport (renderVisibleOnly)
not-viewable: the demand partner is waiting for the placement to be in view
awaiting-trigger: an interstitial is ready and waiting to be shown