It means that potplayer (audio and video player) starts hardware decoding, that is, it uses GPU (nuclear display or stand-alone display) to decode and play video.

The path to open the hardware settings of potplayer is to right-click anywhere in the area where potplayer plays and displays video images, click Options-Filters-Video Decoder-Built-in Decoder /dxva Settings in the pop-up right-click menu, check "Use Hardware Acceleration", and finally click "OK" below to complete the settings.