The document provides a parent's guide to understanding their teen's social media use. It outlines 6 principles for developing healthy social media habits: 1) the speed, searchability, and reach of social media is new; 2) there is no privacy on the internet; 3) personalities can flip flop online; 4) where teens go online leads to what they do; 5) teens are the product for social media companies; and 6) teens want to talk to parents about social media. It also provides data on popular social media platforms and how teens use them, both benefits and risks of social media use, and tips for parents on learning about social media together with their teens.