Your client wants to run their trainer campaign across three different sports publishers, each with different video creative specifications. One accepts 300x250-only companion ads, one requires VAST and vPaid tags, and the third hasn't sent specifications. How should you traffic this campaign?

The Publisher Spec library in Campaign Manager 360 allows you to define and manage specific creative requirements for different publishers. This is the most efficient solution because it enables you to upload a single set of video assets and then use the library to automatically transcode and generate the necessary formats, sizes, and VAST/VPAID tags required by each publisher, even if their specifications vary. Using only one placement for all three publishers would not address the differing creative specifications. Waiting for all publishers to provide specifications or to have the same specifications would cause unnecessary delays and is impractical given the varying requirements of different platforms.