Vaping is an alternative to smoking. It is like smoking minus several of the adverse effects of the latter: no bad smell and bad breath, no cigarette burns, no more dirty ashtrays, less likelihood of getting cancer and other smoking-affiliated illnesses.
In short, vaping is the name given to the use of a vaporizer. The process involves applying heat to a liquid which generates vapor.
Instead of cigarette smoke, the user inhales an aerosol, commonly called vapor, typically released by a heating element that atomizes a liquid solution known as e-liquid. The user activates the e-cigarette by taking a puff or pressing a button.