Problem

The campaign is Running but one or more creatives are not being served.

Likely Causes

1. 1Creative exceeds the maximum file size (150 KB for display, 5 MB for video).
2. 2Creative is in an unsupported format (display must be JPG, PNG, or GIF; video must be MP4).
3. 3Destination URL is missing or invalid.
4. 4Creative dimensions don't match a supported ad size.

How to Fix It

1. 1
   Compare the creative file against Ad Specifications exactly — format, dimensions, and file size.
2. 2
   Confirm the destination URL loads correctly.
3. 3
   Fix whichever spec is violated and re-upload — there is no waiting period; a corrected creative can begin serving as soon as it's saved.

If It's Still Not Working

If the creative meets spec but is still not serving after saving, contact support with the campaign name and creative details.