Extremist groups are organizations that hold radical beliefs and often advocate for violence to achieve their goals. These groups can be based on political, religious, or ideological ideologies and typically reject mainstream views. Their actions can lead to social unrest and conflict, impacting communities and nations. Many extremist groups operate in secrecy and may recruit members through propaganda or manipulation. Some well-known examples include Al-Qaeda, ISIS, and various far-right or far-left organizations. Governments and organizations worldwide work to counteract the influence of these groups through law enforcement and community outreach programs.