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 3,911,679 websites Google Analytics Event Tracking Customers. We know of 626,526 live websites using Google Analytics Event Tracking and an additional 3,285,153 sites that used Google Analytics Event Tracking historically and 259,139 websites in the United States.
Get a list of 3,911,679 websites using Google Analytics Event Tracking which includes location information, hosting data, contact details, 626,526 currently live websites and an additional 732,295 domains that redirect to sites in this list. 3,285,153 sites that used this technology previouslyand 259,139 websites in the United States currently using Google Analytics Event Tracking.
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