The idea of viral marketing is one of the more recent ways of marketing to come to the Internet. As the word ‘viral’ suggests, it depends on people passing your promotional material around like a cold. It would normally travel from friends and colleagues to their friends and colleagues ad infinitum. You can imagine that if I sent a message to all the people in my address book and they did the same, the message would perhaps get to a million people in a month. All free of charge.
