Different roasting methods of coffee beans can produce different tastes:

Darkly roasted coffee tastes stronger, heavier, and richer, and is generally used for espresso.

Medium roasted coffee beans have higher acidity and lighter taste, and are generally used in ordinary coffee.

Extended information:

Coffee roasting is divided into eight stages

1. Light roasting (LIGHTRoast)

2. Light roasting Roast (CINNAMONRoast)

3. Medium Roast (MEDIUMRoast)

4. Medium Roast (HIGHRoast)

5. Medium Roast (CITYRoast)

6. Deep roast (FULL-CITYRoast)

7. Extremely dark roast (FrenchRoast)

8. Extremely dark roast (ItalianRoast)

Extended source of information: Baidu Encyclopedia_Coffee Roasting