The document discusses the impact of social media and why it will significantly influence communication and marketing. It notes that social media allows for two-way conversations rather than one-way advertising. Key reasons it will have an impact include its growing popularity as a means of communication, its ability to start discussions about brands and products, and that future consumers are already accustomed to engaging on social media platforms. The document advocates for businesses to listen to conversations on social media and find ways to participate in and guide discussions in order to influence their customers.