Triple J is a nationally-networked, government-funded Australian radio station (a division of the Australian Broadcasting Corporation), mainly aimed at youth (defined as those between 12 and 25). Music played on the station is generally more alternative than commercial stations with a heavy emphasis on Australian and live music. In metropolitan rating surveys Triple J usually has less than one third the market share of its major commercial rivals, but its influence on Australian popular music belies the modest ratings, having provided a launchpad for numerous Australian recording artists and announcers.