Windows Personalized Ads
July 20, 2018 - 10:44 amThe Windows Advertising ID is used by Microsoft to provide so called relevant ads. It allows apps to track your identity over app borders.
Microsoft describes the ID with these words:
Windows generates a unique advertising ID for each user on a device, which app developers and advertising networks can use to provide more relevant advertising in apps. When the advertising ID is enabled, apps can access and use it in much the same way that websites can access and use a unique identifier stored in a cookie. Thus, app developers (and the advertising networks they work with) can use your advertising ID to provide more relevant advertising and other personalized experiences across their apps.