The document discusses how the medium used to communicate a message can impact how that message is perceived. It provides examples of how asking someone "What are you doing tonight?" via text message versus email would be viewed differently. A text is seen as more casual while an email is more formal. The same applies to asking a classmate for help on an assignment - a text is informal while an email is professional. Face-to-face communication is considered the best way to ensure a message is understood clearly. In conclusion, the choice of communication medium sends its own message, so taking time to select the most appropriate channel is important.