UET is Universal Event Tracking, Microsoft Advertising’s sitewide tracking system for conversions and remarketing.
It matters because Microsoft Advertising can reach valuable search and professional audiences that are often overlooked. Clear measurement and audience structure help the channel complement Google Ads rather than simply duplicate it.
Example
Example: A Bing Ads campaign can use UET to track form submissions and build remarketing lists from website visitors. Without UET, the platform has less data for optimization and reporting.