When Chris Brogan and Julien Smith wrote their bestseller Trust Agents, being interesting on the Web was enough to build an audience. Now everybody has a platform. But most of them are just making noise. In The Impact Equation, Brogan and Smith show that to make people truly care about what you have to say, you need more than just a good idea, trust among your audience, or a certain number of followers.

As traditional channels for marketing and selling disappear and more people interact online, the very nature of attention is changing. Use the Impact Equation to figure out what you're doing right and wrong. Apply it to a blog, a tweet, a video, or a mainstream advertising campaign. Use it to explain why a feature in a national newspaper that reaches millions might have less impact than a blog post that reaches a thousand passionate subscribers.

The Impact Equation will give you the tools to guarantee your message will be heard.