1. A device that informs a user within an environment, comprising: a processor; a notification output; and a memory storing instructions that, when executed by the processor, cause the device to: monitor an activity of the user within the environment; identify the activity of the user within the environment; determine, within the activity of the user, an event that represents a notification opportunity to notify the user of the information without interrupting the activity of the user; detect, within the activity of the user, an instance of the event that represents the notification opportunity; and during the instance of the event, present to the user, through the notification output, a notification of the information.