WinkSound put out a video that offers an unusual tip for using compression on a vocal in a mix. It refers to some common compressor controls the I go over in my recent post on how to use Reaper's built-in compressor plugin called ReaComp.
See that article here: Vocal Compression Using Reaper’s ReaComp Effect Plugin.
In this WinkSound video tip, conventional settings are pretty much thrown out in that it is recommended to turn both the attack and release controls all the way to the fastest possible settings.
In combination with those settings, in order to not completely destroy the vocal with over-compression, a quite high threshold is used (about -10db) and a subtle compression ratio.
But things are usually made more clear by watching. So below is the video of which I speak: