8. An apparatus comprising at least a processor and a memory, wherein the processor and/or memory are configured to perform the following operations: obtaining a plurality of models for classifying a plurality of messages based on a plurality of message features for each message, each message sent via a computer network between a selected one of the promoting entity accounts and one or more subscribing users that subscribe to receive messages from such selected promoting entity account, wherein each model is trained to identify whether a message belongs to a particular class based on a lexicon that was generated for such particular class and a training set of messages that belong to the particular class and messages that do not belong to the particular class; and classifying a new message based on the models and retaining classification information regarding the new message in a database that is accessible by a user so as to review the classification information on a computer display.
8. An apparatus comprising at least a processor and a memory, wherein the processor and/or memory are configured to perform the following operations: obtaining a plurality of models for classifying a plurality of messages based on a plurality of message features for each message, each message sent via a computer network between a selected one of the promoting entity accounts and one or more subscribing users that subscribe to receive messages from such selected promoting entity account, wherein each model is trained to identify whether a message belongs to a particular class based on a lexicon that was generated for such particular class and a training set of messages that belong to the particular class and messages that do not belong to the particular class; and classifying a new message based on the models and retaining classification information regarding the new message in a database that is accessible by a user so as to review the classification information on a computer display. 9. The apparatus of claim 8 , wherein the processor and/or memory are further configured to provide content from the new message to other users who are not subscribers to the new message's corresponding promoting entity account based on the classification of such new message.