What is the purpose of a coffee grinder in brewing?

The primary purpose of a coffee grinder in brewing is to create uniform coffee grounds that enhance extraction. When coffee beans are ground, their surface area increases, allowing water to extract flavors, oils, and compounds during the brewing process. A consistent grind size is crucial because it ensures an even extraction, which leads to a balanced flavor profile in the final cup. If the grounds are uneven, some may become over-extracted, resulting in bitterness, while others may remain under-extracted, leading to sourness. By achieving a uniform grind, the coffee grinder plays a key role in optimizing the brewing process and enhancing the overall taste and quality of the coffee.