Various implementations described herein provide systems and methods for online advertising and, more particularly, systems and methods that utilize user preferences in providing online advertising. In various implementations, systems or methods described herein facilitate user control of user-related data with respect to online advertisement systems, which can include supply-side platforms (SSPs), advertisement exchanges, demand-side platforms (DSPs), content delivery networks (CDNs), ad networks, or adservers. In some implementations, the system and methods implement or otherwise facilitate a user advertisement preference service that enables online users to manage one or more user advertisement preferences and selectively provide those user advertisement preferences to online advertisement systems.