Outsider art refers to artwork created by individuals who are not formally trained in the arts and often work outside the mainstream art world. This type of art is typically produced by self-taught artists, including those with mental health issues or social challenges. The term emphasizes the unique perspectives and experiences of these creators, often resulting in raw, expressive, and unconventional works. The movement gained recognition in the late 20th century, with notable figures like Henry Darger and Jean Dubuffet championing its value. Outsider art is celebrated for its authenticity and originality, offering insights into the human experience from diverse viewpoints.