I eat ginger everyday. Yes. The actual underground stem of a plant (Zingiber officinale). I like it in my green juice (extra spicy please) or sliced thinly with my stir-fry. Medicinally, ginger helps to treat common cold, flu-like symptoms, headaches and even motion sickness. So the next time you feel nauseous, bite on a piece of ginger instead of taking a pill.
Asian cooking uses a lot of ginger, such as pickled ginger, ginger tea, ginger rice, and yes ginger cookies.
When possible, of course, always use fresh ginger, whether sliced, grated, or juiced. But in a baking recipe, grounded form is often asked for.