You're training a new colleague to set up non-YouTube connected TV (CTV) campaigns. They need to modify a certain campaign setting in Display & Video 360 so the campaign can run properly, but they can't remember which one it is. What should they do so the campaign can work?

The correct answer is to set the campaign to run ads that are 15-, 30-, and 60-seconds long. Non-YouTube CTV campaigns in Display & Video 360 require specific ad durations to ensure compatibility with various CTV publishers and inventory sources. Many CTV platforms and ad servers are configured to accept these standard lengths, and not having them can prevent ads from serving. Limiting inventory to a particular device is a targeting choice, not a fundamental requirement for a CTV campaign to run. Adding brand safety targeting is a best practice for all campaigns, but its absence doesn't prevent a campaign from running. Purchasing CTV app inventory through both deals and open auction is a strategy for reach and pricing, not a setting that enables the campaign to function.