1. A method implementable in at least one electronic device coupled to a network and a display device, comprising the steps of: receiving from a user a selection of a topic; receiving, over the network, a data set comprising posted content related to the user-selected topic; determining, based on the data set, at least one of volume level and a sentiment type of a plurality of sentiment types of the posted content; and generating to the display device a user interface including a set of icons providing a graphic illustration of at least one of the determined posted-content volume level and posted-content sentiment type.