Ginger is a plant with a thick root that's used to spice food. You can make homemade ginger ale using grated ginger.
Ginger is an important spice all over the world, appearing in things like ginger beer, ginger bread, many Indian dishes, Chinese food, and ginger tea. Since ginger is native to South Asia, it's most commonly found in countries on that continent. Many people use ginger as a home remedy or medicine, as well as a food. In Britain, and increasingly in the US, it's common to describe red hair as ginger.