Hot hits (a form of Hot 100; Top 40; Top 30; Top 20; Top 10. Especially common in Europe following the advent of offshore pirate radio station Laser 558 - briefly reborn as Laser Hot Hits.)
Musicradio is a radioformat where music is the primary source of broadcast content on both commercial and non-commercial stations.
Musicradio is also a means of promoting other enterprises, such as a record label or ad-hoc music events in which the broadcaster(s) have a commercial interest.
The majority of musicradio stations in the United States and Canada are commercial stations that sell advertising to pay for their facilities and transmitters; in addition, many of the larger stations run promotional events such as dance nights, concerts, and even (in the case of some larger stations) entire music festivals.
Music has been one of the driving factors in the advancement of radio technology, from the adoption of wide-band FM to the current upswing in digital media.
Musicradio, particularly top 40, has often acted as both a barometer and an arbiter of musical taste, and radio airplay is one of the defining measures of success in the mainstream musical world.
For example, the Beautiful musicformat that developed into today's Easy listening and Soft rockformats is nearly extinct due to a lack of interest from younger generations, whereas classic rock has become popular over the last 20 years or so and Jack FM has arisen only since 2000 or so.