13. The system of claim 12 , wherein at least one keyword is obtained from at least one of analyzing information from the temporal profile, analyzing information from the general profile, and analyzing information from the application profile.
12. The system of claim 9 , further comprising: a temporal profile maintaining time-related data; a general profile maintaining general data about the user of the user device; and an application profile maintaining data related to applications that the user of the user device has launched and activities that the user of the user device has engaged in while using the applications.