Commercial music is any music genre that is into the mainstream, people from era of Michael Jackson refer to it as pop music too, (irrelevant)
This is usually about Hollywood industry, in India all commercial music is called Bollywood.
o other than any kind of ROCK music where distorted guitar is not involved or some electronic sound is involved ,lyrics, and celebrity status persona and huge fan base to carry a commercial gains out of that music by concert or merchandise or what not is called commercial music.
those are recognized by billboard charts also rock music is included but rock had always separate category to be recognized as commercial. Example for Sashka-55 Dollars