Your client, who is running an in-stream Video campaign through Campaign Manager 360, asks you for advice about when they should consider using default ads placements.What do you tell them?

Default ads in Campaign Manager 360 are designed to serve as a fallback when no other targeted ad can be delivered. This means they are a universal solution, applicable across all user types and devices (desktop, mobile, tablet, etc.). Their purpose is to ensure that an impression is always served, preventing blank ad slots. The other options are incorrect because they limit the use of default ads to specific device types, which contradicts their primary function as a universal fallback. Default ads are not exclusive to any single device category; they are a safety net for all impressions.