Wikipedia
Gebrauchsmusik is a German term, essentially meaning “utility music,” for music that exists not only for its own sake, but which was composed for some specific, identifiable purpose. This purpose can be a particular historical event, like a political rally or a military ceremony, or it can be more general, as with music written to accompany dance, or music written for amateurs or students to perform.
While composer Paul Hindemith is probably the figure most identified with this expression, it seems to have been coined within the realm of musicology rather than composition. In the late 19th and early 20th centuries, the modern academic discipline of musicology was formulated by a mainly German group of scholars who were interested not only in formal development and biographical data, but also to an extent in the sociopolitical position of music throughout history, and the relationship of music and musicians to society at large.