1. A computer-implemented method for receiving a notification related to a predicted future geographic location of a mobile device, the method comprising: subscribing, by one or more computing devices, to a publisher feed, the publisher feed being associated with one or more content items, each content item being associated with a point of interest; determining, by the one or more computing devices, a plurality of geographic locations of the mobile device, wherein each of the plurality of geographic locations is associated with a timestamp; determining, by the one or more computing devices, a speed of the mobile device based on at least a subset of the plurality of geographic locations and associated timestamps; predicting, by the one or more computing devices, a future geographic location of the mobile device based on the speed and at least one geographic location from among the plurality of geographic locations; providing, by the one or more computing devices, to a server, a representation of the predicted future geographic location of the mobile device; when at least one content item from the publisher feed is associated with a point of interest that is located within a threshold distance of the predicted future geographic location, receiving, by the one or more computing devices, from the server, a notification related to the at least one content item; when the speed of the mobile device exceeds a threshold speed, providing, by the one or more computing devices, an audio output corresponding to the notification; and when the speed of the mobile device does not exceed the threshold speed, providing, by the one or more computing devices, a visual output corresponding to the notification.