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 4,149,353 websites Google Analytics Event Tracking Customers. We know of 883,731 live websites using Google Analytics Event Tracking and an additional 3,265,622 sites that used Google Analytics Event Tracking historically and 415,316 websites in the United States.
Get a list of 4,149,353 websites using Google Analytics Event Tracking which includes location information, hosting data, contact details, 883,731 currently live websites and an additional 722,404 domains that redirect to sites in this list. 3,265,622 sites that used this technology previouslyand 415,316 websites in the United States currently using Google Analytics Event Tracking.
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