Metasurfaces are ultra-thin, engineered surfaces composed of nanoscale structures designed to manipulate light in unprecedented ways. By precisely controlling the size, shape, and arrangement of these subwavelength elements, metasurfaces can achieve functionalities traditionally requiring bulky optical components, such as focusing, polarization control, and holographic imaging. This revolutionary technology promises to miniaturize optical devices, enhance their performance, and enable entirely new applications across diverse fields, from advanced displays and sensors to telecommunications and energy harvesting.