A water purifier is a device designed to remove impurities and contaminants from water, making it safe for drinking and cooking. It typically uses various filtration methods, such as activated carbon, reverse osmosis, or ultraviolet light, to eliminate harmful substances like bacteria, viruses, and chemicals. These devices are essential for ensuring access to clean water, especially in areas where the water supply may be polluted or unsafe. Many households use water purifiers to improve the taste and quality of their drinking water, contributing to better health and well-being for families and communities.