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 1,038,487 websites that are Bing Universal Event Tracking Customers. We know of 199,367 live websites using Bing Universal Event Tracking and an additional 839,120 sites that used Bing Universal Event Tracking historically and 124,173 websites in the United States.
Get a list of 1,038,487 websites using Bing Universal Event Tracking which includes location information, hosting data, contact details, 199,367 currently live websites and an additional 1,021,720 domains that redirect to sites in this list. 839,120 sites that used this technology previously and 124,173 websites in the United States currently using Bing Universal Event Tracking.