A water purifier is a device or system designed to remove impurities and contaminants from water, making it safe and suitable for drinking, cooking, and other household uses. These impurities can include bacteria, viruses, chemicals, heavy metals, and other harmful substances that may be present in untreated water sources. Water purifiers employ various technologies such as filtration, reverse osmosis, ultraviolet (UV) disinfection, and activated carbon adsorption to effectively remove or neutralize contaminants.