Corn, or maize (Zea mays), is one of the world's most widely cultivated cereals and a vital source of food, feed, and industrial raw materials. While primarily grown for grain, the maize germ contains 3–5% oil, which can be extracted to produce corn oil. This oil is popular for its light flavour, high smoke point, and cholesterol-lowering properties, making it suitable for cooking and food processing.

Beyond edible oil, corn and its by-products are used in starch, ethanol, animal feed, sweeteners, and a wide range of industrial goods. Corn oil is also an essential feedstock for biodiesel production. The United States, China, Brazil, and Argentina are the largest maize producers, driving both global food supply and bioenergy markets. Rich in carbohydrates, protein, and micronutrients, maize remains a staple crop for millions worldwide. Its versatility ensures continuing demand across food, fuel, and industrial sectors.