This document discusses how to design emails for social sharing and mobile viewing. It recommends incorporating social media content into emails through "dispatches" that excerpt social media posts. It also recommends designing emails with scalable layouts that can adapt to mobile screens through techniques like grid systems, single columns, grouping content, and increasing font sizes. CSS media queries are also presented as a way to customize email styling for different devices. The document provides examples and best practices for creating emails that encourage social sharing and scale appropriately for mobile viewing.