AdDEFAULT
AdDEFAULT is a term that generally refers to a default advertisement or a placeholder advertisement used in advertising systems. This can manifest in several ways. For example, in online advertising platforms, if a specific ad campaign or creative is unavailable, or if a user has not yet been targeted with a personalized ad, a default ad may be displayed. This default ad can be a generic advertisement from the platform provider, a public service announcement, or an ad from a specific advertiser that has a standing agreement for such placements.
The purpose of an AdDEFAULT is often to ensure that an advertising space is always filled, thereby