E-cigarettes heat a liquid (e-liquid or vape juice) to produce an aerosol, rather than burning tobacco. This eliminates the smoke and many harmful by-products associated with combustion, such as tar and carbon monoxide.
E-cigarettes deliver nicotine through vapor, which some users find to be less irritating than smoke. They offer a range of nicotine strengths, allowing users to adjust their intake.
While not without risks, e-cigarettes generally present fewer health hazards compared to traditional smoking due to the absence of burning tobacco. However, long-term effects are still being studied.