Enforcer is Unify's built-in stereo compressor.
A compressor is essentially an amplifier which has one gain value for inputs below a threshold, and a lower gain for signals above the threshold. Like most compressor plug-ins, Enforcer has an internal fixed-gain stage (traditionally called make-up gain) after the compression stage.
All five knobs work the same way as most others in Unify:
Enforcer is derived from open-source code originally published by British professors Joshua Reiss and Andrew McPherson, who kindly granted permission for it to be incorporated into Unify.
All of the Reiss-McPherson code is available at https://github.com/getdunne/audio-effects. The revised Compressor code (virtually identical to Enforcer) is at https://github.com/getdunne/audio-effects/tree/master/effects-new/03%20-%20Compressor