Smart glass, also known as switchable glass, is a glazing technology that alters its transparency on demand. Using electrochromic, thermochromic, or liquid crystal layers, it switches from clear to opaque to deliver instant privacy and glare control. This dynamic tinting blocks UV and infrared rays, boosting energy efficiency by reducing cooling loads. It is widely adopted in smart homes, corporate offices, and automotive sunroofs, blending modern aesthetics with intelligent functionality.