Unique-user (device ID) is an identifier assigned to a user or device that lasts until the account is deleted or the device is reset. For example, Fliphound creates a unique advertiser specific user ID (or device ID) that is tied to each account on its online outdoor advertising platform and network. Fliphound also creates a unique billboard owner specific user ID (or device ID) that is tied to each billboard operators (media owners) account that displays ad inventory on its outdoor advertising platform. Online advertising companies like Google, Apple and Facebook also provide similar unique-user IDs tied to each account on their networks.
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