Events are user interactions with content that can be tracked independently from a web page or a screen load.
https://developers.google.com/analytics/devguides/collection/analyticsjs/events
Analytics and Tracking
Get access to data on 3,508,834 websites that are Google Analytics Event Tracking Customers. We know of 518,647 live websites using Google Analytics Event Tracking and an additional 2,990,187 sites that used Google Analytics Event Tracking historically and 212,609 websites in the United States.
Get a list of 3,508,834 websites using Google Analytics Event Tracking which includes location information, hosting data, contact details, 518,647 currently live websites and an additional 698,649 domains that redirect to sites in this list. 2,990,187 sites that used this technology previouslyand 212,609 websites in the United States currently using Google Analytics Event Tracking.
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