This document discusses viral marketing and what makes a video go viral. It states that viral marketing is both an art and a science. For a video to go viral, it should have certain core elements - it needs little to no initial branding, draw on human emotions, have good quality audio, and tell a compelling story. This engages the artistic side of viral marketing. However, the document also notes that science is involved - things like demographics of the target audience like age and gender, and how feelings of control impact sharing of content. It emphasizes that data should support any viral marketing strategy. Finally, it questions whether a given concept can actually drive business results and have a good return on investment or conversion rate.