Electronic cigarette is a safer alternative to tobacco smoking, or a smoking cessation device, as it attempts to deliver the experience of smoking without, or with highly reduced, adverse health effects usually associated with traditional cigarettes.

A conventional cigarette burns tobacco whereas the e-cigarette uses a battery-propelled heat to vaporize odorless propylene glycol or varying amounts of nicotine contained in a cartridge. The vapor is then inhaled by a user, without involving any real smoke. Hence, instead of inhaling tar and the other substances that clog up our lungs and arteries, one only inhale a vapor which contains nicotine.