Underground music is defined by its experimental, non-mainstream nature and do-it-yourself approach to production. It is created without support from major commercial labels and appeals to niche audiences through social and cultural capital rather than commercial success. Throughout history, underground music has incorporated social and political commentary on topics the mainstream avoids, and served as a cultural identity for communities and scenes. While retaining artistic independence, underground music also intersects with commercial interests as cultural movements are sometimes co-opted by the mainstream.