input: [Term in DART for Publishers] Internal redirect (sometimes called an "inred") A command, contained in an ad, that tells an ad server to retrieve a different ad from the pool of inventory that belongs to either a DART for Advertisers network or a different DART for Publishers ad network. Similar to third-party creatives, they are used to retrieve a creative asset. However, internal redirect tags aren't sent to the user's browser; instead, they are processed internally within the DoubleClick system.
output: DoubleClick tag (sometimes called an "internal redirect") Is functionally identical to an inred in DART. It can be hosted by either DoubleClick Campaign Manager (DCM) or DART for Publishers. (Learn how to Traffic DoubleClick tag creatives)