Unknown, Uninitialized, and Untargeted all refer to impressions served for which we cannot determine the geo.
Unknown: Impressions served in countries that we cannot identify. We update our database regularly to ensure such instances are as few as possible.
Uninitialized: Impressions served to users who don’t have a ZEDO geo cookie. We always detect the geographical location of the users on the first hit, but in case of blocked or unsupported cookies or traffic loss, we sometimes can’t target users.