Terrorist groups are organizations that use violence and intimidation to achieve political, ideological, or religious goals. They often target civilians to create fear and draw attention to their causes. These groups can operate locally, nationally, or internationally and may have specific agendas, such as promoting a particular ideology or opposing a government. Many terrorist groups are known for their recruitment tactics, often targeting vulnerable individuals. They may use propaganda to spread their messages and justify their actions. Some well-known examples include Al-Qaeda, ISIS, and Boko Haram, each with distinct motivations and methods of operation.