The fundamental function of Facebook (and other social networking sites, such as Twitter) is allowing "friends" to share information. Friends are people who have agreed to communicate with and allow one another some level of access to personal information. Anyone with access to the internet can join Facebook, the most popular social networking site, and connect with contacts. As of June 2017, Facebook claimed more than 2 billion monthly active users. In healthcare, Facebook posts can influence the hiring process, violate patient privacy, and result in termination of employment. This module informs healthcare professionals of the risks of social networks, which break down the walls separating our personal and professional lives.