Plain English Meaning
A named chunk of airspace where the military trains. When it is switched on, fast military aircraft may be doing tactical maneuvers inside it. You can fly through it as a VFR pilot, but you need to stay alert and check whether it is active first.
Full Definition
A specific Military Operations Area (MOA) named Camden Ridge, established to contain certain military flight training activities. Like all MOAs, it has defined lateral and vertical boundaries and active times during which military aircraft may conduct maneuvers such as air combat tactics, formation flying, and low-altitude training. VFR pilots may transit the area when it is active but should caution; is routed of the active MOA or separated by .