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 1,624,561 websites Facebook Pixel for Shopify Customers. We know of 358,543 live websites using Facebook Pixel for Shopify and an additional 1,266,018 sites that used Facebook Pixel for Shopify historically and 195,288 websites in the United States.
Facebook Pixel for Shopify websites that are also using other technologies.
Get a list of 1,624,561 websites using Facebook Pixel for Shopify which includes location information, hosting data, contact details, 358,543 currently live websites and an additional 156,486 domains that redirect to sites in this list. 1,266,018 sites that used this technology previouslyand 195,288 websites in the United States currently using Facebook Pixel for Shopify.
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