Overview#Advertising ID is an End-User resettable device Unique Identifier assigned device or Operating System to help advertising services.
Advertising ID are similar to traditional browser-based cookies. Advertising ID can be sent to advertisers and an other Third-party which could be used to for Identity Correlation and for Tracking the user's movement and usage of applications. There is a potential for such technology to replace Tracking Cookie.
Advertising ID is used in Real-Time Bidding