Multiple Input Multiple Output (MIMO) is a wireless technology that uses multiple antennas at both the transmitter and receiver ends to improve communication performance. By sending and receiving more than one data signal simultaneously over the same radio channel, MIMO enhances data rates and increases the capacity of the network. This technology is widely used in modern Wi-Fi systems and cellular networks, allowing for faster and more reliable connections. MIMO helps to mitigate issues like interference and signal fading, making it a crucial component in achieving efficient wireless communication in various applications, including 4G and 5G networks.