Universal Event Tracking (UET) is a simple and powerful campaign measurement solution that allows you to track key conversion goals important to your business.
http://advertise.bingads.microsoft.com/en-us/universal-event-tracking
Analytics and Tracking · Conversion Optimization · Retargeting / Remarketing
Get access to data on 1,007,791 websites that are Bing Universal Event Tracking Customers. We know of 186,209 live websites using Bing Universal Event Tracking and an additional 821,582 sites that used Bing Universal Event Tracking historically and 120,376 websites in the United States.
Get a list of 1,007,791 websites using Bing Universal Event Tracking which includes location information, hosting data, contact details, 186,209 currently live websites and an additional 1,074,257 domains that redirect to sites in this list. 821,582 sites that used this technology previously and 120,376 websites in the United States currently using Bing Universal Event Tracking.