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 3,589,947 websites that are Google Analytics Event Tracking Customers. We know of 497,247 live websites using Google Analytics Event Tracking and an additional 3,092,700 sites that used Google Analytics Event Tracking historically and 203,136 websites in the United States.
Get a list of 3,589,947 websites using Google Analytics Event Tracking which includes location information, hosting data, contact details, 497,247 currently live websites and an additional 609,243 domains that redirect to sites in this list. 3,092,700 sites that used this technology previouslyand 203,136 websites in the United States currently using Google Analytics Event Tracking.
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