The document outlines 8 secrets to designing viral infographics. It recommends starting with a solid foundation by doing thorough preparation and conceiving an interesting visual metaphor. It also recommends including crucial content like relevant diagrams, data, and interesting facts. The narrative should tell a story and solve problems or answer questions. Clear calls to action and sharing opportunities should be included to give the infographic the best chance of going viral. Following these design tips can help create an engaging infographic.