Deciding when and which subscribers should be exposed to advertising is complex. It depends on many factors, such as the subscriber’s price plan,usage context,opt-in procedures and regulations. An agreement needs to be reached between customers and their service provider to reflect the operator’s obligation to protect user privacy in exchange for the subscribers consent to being exposed to targeted advertisements. Ensuring customer satisfaction can be a complex process;a negative experience may reflect badly on the service provider and possibly cause the consumer to refuse advertising services.