QAM Modulation, or Quadrature Amplitude Modulation, is a technique used in digital communication to transmit data efficiently. It combines two signal waves, varying both the amplitude and phase, to encode information. This allows multiple bits of data to be sent simultaneously, increasing the data rate without requiring additional bandwidth. In QAM, different combinations of amplitude and phase create unique signal states, known as symbols. Each symbol represents a specific set of bits, enabling the transmission of complex data streams. This method is widely used in various applications, including Wi-Fi, television broadcasting, and cellular networks.