HD, Full HD, 2K, 4K, 8K and 10K are different screen resolutions, whether for TVs, monitors, among others.
HD : 1280 x 720 pixels
FHD : 1920 x 1080 pixels
FHD+ : 2160 x 1080 pixels
QHD : 2560 X 1440
QHD+ : 3200 X 1800
4K : 3840 x 2160 pixels
5K : 5120 X 2880 MM
8K : 7680 x 4320 pixels
10K : 10240 x 4320 pixels
