Tin foil, also known as aluminum foil, is a thin, flexible sheet made of aluminum. It is commonly used for wrapping, storing, and cooking food. Tin foil is heat-resistant and can be easily molded to cover dishes or wrap around food items. It helps to retain moisture and heat when cooking, making it a versatile kitchen essential. Additionally, tin foil can be used for various household tasks such as lining baking sheets, covering surfaces for easy cleanup, and even crafting projects.