If you have a large selection of banners to upload, you have the option to “bulk import” a ZIP file.
Here is how:
From your Advertiser dashboard, go to Programs > Creatives
In the Creatives page, select +Add Creative > Bulk Import
Select the campaign you wish to import creatives for, then click the “Browse” button.
Search for the ZIP file you would like to upload, select it, and click “Upload” to finalize the import.
You will receive a confirmation page with the list of all banners that were uploaded along with all of their details.
All the uploaded banners should now be displayed on your Creatives page.