The message of course is what communication is all about. Whatever is communicated is the message. Denis McQuail (1975) in his book Communication writes that the simplest way of regarding human communication is ‘to consider it as the sending from one person to another of meaningful messages’.
The Shannon-Weaver Model, in common with many others separates the message from other components of the process of communication. In reality, though, you can only reasonably examine the message within the context of all the other interlinked elements. Whenever we are in contact with other people we and they are involved in sending and receiving messages. The crucial question for Communication Studies is: to what extent does the message received correspond to the message transmitted? That’s where all the other factors in the communication process come into play.