Undermount sinks are a type of sink installed beneath the countertop, creating a seamless look. This design allows for easy cleaning, as there are no edges or rims to trap dirt and debris. They are commonly made from materials like stainless steel or ceramic, which can complement various countertop materials such as granite or quartz. These sinks are popular in modern kitchens and bathrooms due to their sleek appearance and functionality. However, they typically require professional installation and may need additional support, especially with heavier materials. Overall, undermount sinks offer both aesthetic appeal and practical benefits.