What is Coffee roaster machine?

A coffee roaster machine is a device used to roast coffee beans. The roaster applies heat to the beans, causing them to change in color and flavor as they are roasted to various degrees, such as light, medium, or dark. The type of roaster and the roasting process used can greatly affect the final flavor profile of the coffee. Roasters can be small and simple, for home use, or large and complex, for commercial use.