If you're using Google Floodlight and support adding multiple products to your cart or purchasing multiple products, you'll need to make adjustments to the Pinterest tag in order to pass back multiple product IDs. This is necessary for running dynamic retargeting campaigns.
Use the macro function and the product IDs parameter in this syntax:
https://ct.pinterest.com/v3/?tid=2619214552931&event=pagevisit&ed[line_items][0][product_ids]=11149134,11149144,11149126,11168014&noscript=1&dbgppce=true
The [product_id] parameter only supports single product ID passback. [product_ids] supports multiple comma separated values.
For example: