This document discusses using data and science to optimize social media marketing. It begins by introducing the speaker as both a scientist and technologist. It then outlines how data is used in various applications like targeting customers and improving healthcare. Despite the abundance of data on social media, non-quantitative advice is often followed. The speaker then details various data-driven tips for social media based on over 2.5 million data points, such as what type of posts generate more engagement and which words drive more link clicks and shares. Specific data is also presented on the importance of networks for home design and tips for getting the most engagement from design posts. Comments, rather than likes, are identified as the most powerful social signal.