Cognitive Radio is a smart communication technology that allows devices to automatically detect available channels in a wireless spectrum and adjust their transmission parameters accordingly. This helps optimize the use of radio frequencies, reducing interference and improving overall communication efficiency. By using advanced algorithms and machine learning, Cognitive Radio can learn from its environment and make real-time decisions about which frequencies to use. This technology is particularly useful in areas with high demand for wireless communication, such as urban environments, where it can help manage the limited available spectrum more effectively.