Social Media is …
the set of Web-based broadcast technologies that enable the democratization of content, giving people the ability to emerge from consumers of content to publishers.
Social media is like water. On its own, water does some cool things, but when combined with other compounds, it enabled the evolution of all forms of life. Social media on its own is nice, but when combined with other tools, it is enabling everything to evolve, from communications to business to politics to marketing.
—Mike Volpe, VP Marketing, HubSpot