Hi All,

Over the holiday weekend, we had some interesting behavior with our Pmax campaigns. We recently launched a new product feed for Canada on our Shopify store, and our Pmax campaigns have an asset group “bucket” for all products in different categories. I created separate campaigns for the US and Canada products, but realized I left the US bucket to still include “all products,” which means it could technically pick up the Canada products. However, I’m confused if these would even show to US customers because they have pricing and shipping details specific to Canada. Basically, the ROAS dropped by 2x, while overall sales doubled which led me to believe it’s double serving ads without taking our ROAS rule into consideration for the new product feed. I’ve since isolated the asset groups on both campaigns (which also means I can’t use an all products “bucket” anymore until I setup different rules).

Do these results make sense to anyone? Would a Canada product feed with effectively duplicate products using Canada shipping details double serve ads and crash ROAS on the US campaign, or do we have something else going on? I’m using a tROAS rule at 200% on the primary US campaign with max conversions.

Thanks for any input!