What the heck is a "Void of Course Moon?" Sounds like a good title for a novel, if nothing else. Except if we began such a novel, we'd want to make sure the Moon is not Void when we begin typing.
A "Void Moon" (more properly called "Void of Course Moon") occurs when the Moon makes her last aspect in whatever zodiac sign she's in and it ends when she enters the next sign. The Moon is said to "carry the light" or energy of all the other planets; their energy must cross the lunar boundary to reach earth.
Have we ever had one of those mind frazzled days when we try and get everything done at once, only to find by such a scattering of goals nothing gets accomplished? Or a day when we just don't really feel like doing anything, but think we should do something so make half-hearted attempts towards some end or other, but nothing really gets done?
Moon Void of Course is our guiding Moon having one of these days. A "course" is a goal, a direction, "void" is null, and a Void of Course Moon has no direction: she's telling us that at this time goal directed actions are not favored.
It is better to avoid beginning important new projects or buying important or expensive items while the Moon is Void. The traditional meaning of a Void Moon is "nothing will come of it," or it will "fail of its purpose." Work on old stuff when the Moon is Void, and leave the shopping to people who enjoy standing in return lines.