Adaptive modulation is a technique used in communication systems to optimize data transmission. It adjusts the modulation scheme based on the current conditions of the communication channel, such as signal quality and interference. By selecting the most suitable modulation format, the system can enhance data rates and maintain reliable communication. This method is particularly useful in wireless networks, where environmental factors can change rapidly. For instance, in a cellular network, Wi-Fi, or satellite communication, adaptive modulation helps ensure that users receive the best possible service, even in varying conditions, by dynamically switching between different modulation levels.