Responsive Ads
Ad Size
Image
Landscape (1,91:1) : 1200x628 (high) and 600x314 (low).
Square: 1200x1200 (high) and 300x300 (low).
Logo
Landscape (4:1): 1200x300 (high) and512x128 (low).
Square: 1200x1200 (high) and 128x128 (low).
Quantity
Image
Max 15 images.
Min 1 image.
Logo
Max 5 logos.
Min 1 logo.
Weight
5 mo for each asset.
Text assets
Up to 5 titles of 30 characters each.
Up to 5 descriptions of 90 characters each.
One long title of 90 characters.
Image quality
Each image should meet high quality standards. This list sums up a few things (but not limited to) that you should bear in mind
Should be well oriented (not skewed, not stretched, and so on).
No blur effect.
No flashy elements.
No blinking elements.
No visual effects that attract immediate attention.
No bad quality images.
Third party ad tags
In case you are willing to use third party ad tags, those are perfectly fine as long as they meet the general requirements and abide by the general advertising rules. You can consult the general banner specs for more information.
Landing Page & Tracking
Destination URL
Any URL that points to the advertiser's landing page.
Click Tracker
Accepted (must be compatible with parallel tracking).
Impression Tracker
Not accepted.
Google Analytics UTM or similar URL params
Highly recommended.