그램 (g) is a unit of mass in the metric system, commonly used to measure small quantities of substances. One gram is equal to one-thousandth of a kilogram, which is the base unit of mass in the International System of Units (SI). Grams are often used in cooking, science, and nutrition to quantify ingredients and food portions. In everyday life, you might encounter grams when reading food labels, where the weight of nutrients is listed in grams. For example, a banana might weigh around 120 grams, helping consumers understand portion sizes and nutritional content.