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 1,075,244 websites that are Bing Universal Event Tracking Customers. We know of 164,245 live websites using Bing Universal Event Tracking and an additional 910,999 sites that used Bing Universal Event Tracking historically and 103,161 websites in the United States.
Get a list of 1,075,244 websites using Bing Universal Event Tracking which includes location information, hosting data, contact details, 164,245 currently live websites and an additional 974,491 domains that redirect to sites in this list. 910,999 sites that used this technology previously and 103,161 websites in the United States currently using Bing Universal Event Tracking.