E-cigarettes, or electronic cigarettes, are battery-operated devices that deliver nicotine and flavor through vapor instead of smoke. They provide an alternative to traditional smoking by heating a liquid—usually containing nicotine, flavorings, and other chemicals—to create an inhalable vapor. E-cigarettes are often used by smokers looking to reduce or quit smoking conventional cigarettes. They come in various styles and flavors and are considered by some as a less harmful option compared to traditional tobacco products, although their safety and long-term effects are still being studied.