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 3,535,552 websites that are Google Analytics Event Tracking Customers. We know of 512,776 live websites using Google Analytics Event Tracking and an additional 3,022,776 sites that used Google Analytics Event Tracking historically and 209,377 websites in the United States.
Get a list of 3,535,552 websites using Google Analytics Event Tracking which includes location information, hosting data, contact details, 512,776 currently live websites and an additional 654,568 domains that redirect to sites in this list. 3,022,776 sites that used this technology previouslyand 209,377 websites in the United States currently using Google Analytics Event Tracking.
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