World music is a very wide category and is hard to define in one sentence. It involves many cultures and some would say that world music reflects a non-western culture. Its traditional music created by indigenous people. It is music that is not associated with American popular music, but is still widespread and could also combine western popular music with other genres. It is known simply as 'music' to other people in the world.
Its ethnic style gives world music its own category, as it sounds different to 'pop music' and has derived from other cultures other than Western Europe and English speaking North America. It has an exotic sound which is created using different instruments and musical styles and harmonies. The term 'world' music is a general one and helps the music industry to sell more under this title as opposed to having many different categories.