The analytics.js JavaScript snippet is a new way to measure how users interact with your website. It is similar to the previous Google tracking code, ga.js, but offers more flexibility for developers to customize their implementations.
https://developers.google.com/analytics/devguides/collection/analyticsjs/
Analytics and Tracking
Get access to data on 53,552,791 websites that are Google Universal Analytics Customers. We know of 22,815,063 live websites using Google Universal Analytics and an additional 30,737,728 sites that used Google Universal Analytics historically and 2,981,692 websites in the United States.
Google Universal Analytics websites that are also using other technologies.
Get a list of 53,552,791 websites using Google Universal Analytics which includes location information, hosting data, contact details, 22,815,063 currently live websites and an additional 4,366,441 domains that redirect to sites in this list. 30,737,728 sites that used this technology previously and 2,981,692 websites in the United States currently using Google Universal Analytics.
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