Roasted coffee is made from coffee beans that have been heated to bring out their flavor and aroma. The roasting process transforms the green coffee beans into the brown beans commonly used to brew coffee. Different roasting levels, such as light, medium, and dark, affect the taste, acidity, and body of the coffee. During roasting, chemical reactions occur, producing various compounds that contribute to the coffee's unique characteristics. The temperature and duration of roasting can vary, allowing for a wide range of flavors. Roasted coffee is typically ground and brewed to create beverages enjoyed worldwide, often served in cafes and homes.