A coffee roaster is a machine or person that transforms raw, green coffee beans into roasted coffee. This process involves heating the beans to develop their flavor, aroma, and color. Roasting can vary in duration and temperature, resulting in different roast levels, such as light, medium, or dark. Many coffee roasters operate small businesses, often referred to as coffee roasteries, where they sell freshly roasted beans to consumers. The roasting process is crucial for enhancing the natural characteristics of the beans, which come from various regions, such as Ethiopia or Colombia.