The HD Audio Driver for Display Audio is a driver that enables audio functionality through a display device, such as a monitor or TV, that has built-in speakers or an audio-out connection via HDMI, DisplayPort, or other display interfaces. This driver is typically needed when you're using your computer’s graphics card (GPU) to send both video and audio signals to a display device, such as a TV or an external monitor that supports sound output.

In many cases, when you connect your computer to a display with HDMI or DisplayPort, the audio signal needs to be sent over the same cable, and the HD Audio Driver ensures that the system recognizes the display as an audio output device.