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 972,710 websites that are Bing Universal Event Tracking Customers. We know of 219,493 live websites using Bing Universal Event Tracking and an additional 753,217 sites that used Bing Universal Event Tracking historically and 135,520 websites in the United States.
Get a list of 972,710 websites using Bing Universal Event Tracking which includes location information, hosting data, contact details, 219,493 currently live websites and an additional 1,186,081 domains that redirect to sites in this list. 753,217 sites that used this technology previously and 135,520 websites in the United States currently using Bing Universal Event Tracking.