This document discusses what makes content spread naturally online. It argues that content is more likely to spread if it generates a physical or emotional reaction in people. Content that is weird, wonderful, unexpected or disruptive tends to elicit reactions and sharing. The document also emphasizes that good content must be timely and align with current trends or events to spread. Finally, it notes that people who create spreadable content tend to be proactive and have fun developing things that entertain or engage audiences.