What this means is that the band can boost or cut toward the Target Gain, based upon Dynamics ratio and Threshold level.
You'll also find Dynamics, Threshold, and Target Gain. But clicking on one of the bands gives you access to more than just the standard frequency, Q, bell/shelf mode, solo, and mute controls. The frequency display may look like that of a standard EQ, complete with real-time response curves. Oxford Dynamic EQ's GUI is the most elegant Sonnox representation ever, with controls that allow novice users to start getting sounds without opening the manual. Fortunately, that's not the case with the recently released Sonnox Oxford Dynamic EQ. When plug-ins of this type appeared, most were confusing to my eyes and sounded artificial or hyped to my ears.
Historically, they were outboard units, making them expensive and limited to one stereo track at a time. Dynamic equalizers have been around for a while.