Another interesting post I have come across, from Branding Strategy Insider.
Get a dictionary and look up the word media. It will contain several different definitions, but this is the meaning that, as a marketer, you will probably be most comfortable with - media, n. : The main means of mass communication, esp. newspapers, radio, and television, regarded collectively.
This is what marketers mean, and have always meant, by the concept of media. It is the classic agglomeration of channels that they consider, plan, buy and evaluate in order to communicate their messages.
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