A marketer is scheduling creatives for their upcoming campaign in Campaign Manager 360. What is one thing they need to do to ensure an ad will run every time?

To guarantee an ad runs every time, a marketer must create a default ad. A default ad in Campaign Manager 360 serves as a fallback when no other targeted ads are eligible to be served to a user. This ensures that an ad impression is always filled, preventing blank spaces or errors. While setting a geographic target, creating region-specific creatives, or targeting specific device types are valid campaign strategies, they are designed to narrow the audience or creative served, not to ensure an ad always runs. If a user falls outside the geographic target or device type, or if no specific creative matches, a default ad will still be served.