Facebook Pixel specifically for Shopify.
https://help.shopify.com/en/manual/promoting-marketing/analyze-marketing/facebook-pixel
Analytics and Tracking
Get access to data on 1,622,998 websites Facebook Pixel for Shopify Customers. We know of 449,509 live websites using Facebook Pixel for Shopify and an additional 1,173,489 sites that used Facebook Pixel for Shopify historically and 252,558 websites in the United States.
Facebook Pixel for Shopify websites that are also using other technologies.
Get a list of 1,622,998 websites using Facebook Pixel for Shopify which includes location information, hosting data, contact details, 449,509 currently live websites and an additional 187,557 domains that redirect to sites in this list. 1,173,489 sites that used this technology previouslyand 252,558 websites in the United States currently using Facebook Pixel for Shopify.
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