This document defines and discusses key elements of defamation law. Defamation involves harming someone's reputation through false statements. To prove defamation, it must be shown that an identifiable person was subject to a defamatory statement that was published to others. Internet service providers can generally be held liable as publishers if defamatory content is hosted on their servers. However, they may argue that they did not have control over or knowledge of the content. The document also summarizes a landmark Australian defamation case, Gutnick v. Dow Jones, which established that defamation occurs where the damage to reputation takes place, not just where content is uploaded.