A DisplayPort to VGA cable is a cable that allows you to connect a device with a DisplayPort output, such as a laptop or a desktop computer, to a display or monitor that has a VGA input. The cable has a DisplayPort connector on one end and a VGA connector on the other end. It carries the video signal from the DisplayPort output of the device to the VGA input of the display or monitor, allowing you to display content on the VGA screen. This type of cable is commonly used when you want to connect newer devices with DisplayPort outputs to older displays or monitors that only have VGA inputs.