“Societies have always been shaped more by the nature of the media by which men communicate than by the content of the communication.”
~ Marshall McLuhan
In other words, the medium matters. HOW you communicate is just as important as WHAT you communicate.
By definition, most people think of communication as being synchronous. That is, communication that occurs in real time, such as when one person speaks while one or more others listen and then someone else responds. A good example in the world of work is a meeting, where multiple people work together, at the same time, though not necessarily in the same place.