I have been aware of this for many years but really never felt the need to use it. Good solid recording techniques and mixing will, for most styles of music and cases, be more than sufficient.

DJ's and radio stations use this so that when the announcer or DJ speaks into the mic, the music, or the caller's voice (in talk radio) is lowered so that the main voice can easily be heard.

If you use this in music, you certainly want to use it carefully so as to avoid the pumping that would naturally come from it's use.

Most full featured DAW's accommodate this easily.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.