I don’t really know what it means to be honest.
https://pcmonitors.info/reviews/benq-ew3280u/
The monitor supports 10-bits per channel colour output, as required for HDR10 content. This is achieved with a dithering stage on the monitor (8-bit + FRC) when using DisplayPort. When using HDMI at the native resolution, the dithering stage is offloaded to the GPU. We’ve carefully observed a broad range of models under HDR when running with monitor-side vs. GPU-side dithering, including this one. We find the result to be very similar, with the GPU filling in the gaps very well if it has to.