A vertical axis wind turbine is a type of wind turbine in which the main rotor shaft is set transverse to the wind, while the main components are present at the base of the turbine. Depending upon its applications, it can be used to produce power and is more suitable where the space is limited and risk is to be maintained. The replacement and maintenance of the gearbox present on vertical axis wind turbine is easier because it is located near the ground, which reduces the efforts of the operator to climb hundreds of feet in air. It does not need to be pointed into the wind hence, it does not require wind-sensing and orientation mechanism. Vertical axis wind turbine is stronger, smaller, quieter , more economical, and omnidirectional. These can be arranged close to each other which helps in reducing the space required for the installation. These are used for small wind projects and residential applications. They use wind as a renewable source of energy; therefore they are economical as well as eco-friendly. The vertical axis wind turbine market is experiencing growth owing to the increase in demand for clean renewable energy.