Enabling portfolio support for Sponsored Display was one of the top ask from advertisers for a long time. The great news is Amazon finally decided to enable this functionality. It is now available via the Advertising API and we are told it will become available in the Advertising Console by the end of October.
It is now available for Sponsored Display vendors and sellers registered in Amazon Brand Registry in the United States, United Kingdom, Canada, France, Spain, Italy, Germany, United Arab Emirates, Japan, India, Australia, the Netherlands, and Mexico.
Sponsored Display support for portfolios enables advertisers to group and organize Sponsored Products, Sponsored Brands and Sponsored Display campaigns into collections that mirror the structure of their business. With portfolios, you now have the flexibility to arrange campaigns in a way that’s meaningful for you, such as by brand, product category, or season across all self-service ad products. A key advantage portfolios offer is control over spend across campaigns. Once your portfolio budget is exhausted, all campaigns in that portfolio will automatically pause until you choose to reactivate them by increasing your portfolio budget.
Full API documentation is available here. Look for 'portfolio as the new attribute for this functionality.