Social media refers to internet applications driven by user actions and user-generated content. It differs from traditional websites in that users, not website owners, create and share most of the content. Popular social media platforms allow users to share messages, photos, videos, and participate in online communities. Social media is important because it allows influential individuals to quickly share information with many followers and it can be used to organize groups and campaigns. However, social media also raises issues around privacy, inappropriate content, and employers checking profiles. Organizations are advised to engage with social media themselves to avoid others defining their online presence.