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 749,067 websites that are Twitter Website Universal Tag Customers. We know of 187,284 live websites using Twitter Website Universal Tag and an additional 561,783 sites that used Twitter Website Universal Tag historically and 100,949 websites in the United States.
Get a list of 749,067 websites using Twitter Website Universal Tag which includes location information, hosting data, contact details, 187,284 currently live websites and an additional 738,389 domains that redirect to sites in this list. 561,783 sites that used this technology previouslyand 100,949 websites in the United States currently using Twitter Website Universal Tag.
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