Implement Pinterest Buy It Buttons
As of now, companies need to use Demandware, Bigcommerce, Magento, IBM Commerce or Shopify to implement the Pinterest Buy It button. Your ecommerce platform will walk you through the specific process of adding buyable pins through their site. Click the relevant link above to get more information on a specific site.
Peg Corwin's insight:
As I understand it, Pinterest Buy It Buttons are free and different from Promoted Pins. Only certain ecommerce platforms support them.