An air conditioner is an electrical appliance designed to control the temperature, humidity, and air quality within an indoor space. It cools the air using refrigerant technology, providing comfort during hot weather. Available in various types such as split AC, window AC, portable AC, and inverter AC, modern air conditioners also feature energy-saving modes, air purifiers, and smart connectivity. Widely used in homes, offices, and commercial establishments, air conditioners help maintain a comfortable and healthy environment.