A tool from Twitter that makes it possible for advertisers to track website conversions and manage tailored audience campaigns.
https://blog.twitter.com/2016/website-conversion-tracking-and-remarketing-made-easier-and-more-flexible
Analytics and Tracking
Get access to data on 637,670 websites Twitter Website Universal Tag Customers. We know of 199,254 live websites using Twitter Website Universal Tag and an additional 438,416 sites that used Twitter Website Universal Tag historically and 104,854 websites in the United States.
Get a list of 637,670 websites using Twitter Website Universal Tag which includes location information, hosting data, contact details, 199,254 currently live websites and an additional 958,376 domains that redirect to sites in this list. 438,416 sites that used this technology previouslyand 104,854 websites in the United States currently using Twitter Website Universal Tag.
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