A built-in dishwasher offers several advantages over a freestanding dishwasher. Firstly, it seamlessly integrates with your kitchen cabinetry, giving your kitchen a more cohesive look. Secondly, built-in dishwashers are designed to be quieter compared to freestanding ones, as they are insulated within the cabinetry. Lastly, built-in dishwashers generally offer more advanced features and customization options.