This document provides an overview of Facebook and Twitter, the two largest social media platforms. It describes Facebook as the largest social network with over 300 million active users, where people can connect with friends and share photos, videos, and updates. Twitter is summarized as a free messaging tool to stay connected in real-time through short 140-character tweets. The document outlines key features of each platform such as profiles, groups, hashtags, and tools for scheduling posts and analyzing engagement.