A coffee grinder is a kitchen appliance used to grind coffee beans into smaller particles, allowing for the brewing of fresh coffee. There are two main types of grinders: blade grinders and burr grinders. Blade grinders use a rotating blade to chop the beans, while burr grinders crush the beans between two surfaces, providing a more consistent grind size. Using a coffee grinder enhances the flavor and aroma of coffee by releasing essential oils from the beans. Freshly ground coffee can significantly improve the taste compared to pre-ground options. Many coffee enthusiasts prefer to grind their own beans to achieve the best possible brew from their coffee maker.