I used to work in this exact industry and wrote my employer's tracking code. You didn't clarify whether you clicked on a google shopping product and landed on a product page. That's all that is needed.
Many ecommerce sites use both google and facebook for their campaigns. So by you landing on the product page, a standard facebook event would be fired. The website or the advertiser doesn't really need to know who you are but facebook does know who you are once that event is fired. Facebook can then tie you to a campaign around that product for that same website (if they have an active campaign going).
Many ecommerce sites use both google and facebook for their campaigns. So by you landing on the product page, a standard facebook event would be fired. The website or the advertiser doesn't really need to know who you are but facebook does know who you are once that event is fired. Facebook can then tie you to a campaign around that product for that same website (if they have an active campaign going).