Your colleague works with a pet food client who is running an in-stream video campaign through Campaign Manager 360. They’re wondering when they should activate default ad placements.What’s the right advice to tell them?

Default ad placements in Campaign Manager 360 are essential for ensuring ad delivery across all possible scenarios. They act as a catch-all, serving ads when no other more specific ad is eligible for a given impression. This means they should be activated when serving ads to any user or device, regardless of their location or the device they are using. If default ads are not set up, impressions that don't match specific targeting criteria for other ads might be lost, leading to missed opportunities and under-delivery. While specific targeting (like smartphone/tablet or desktop users, or local users) is important for other ad placements, default ads cover the broader, general case.