The HDMI port on your motherboard or GPU usually connects to your primary monitor. If you're using a relatively new graphics card and monitor, your HDMI port is probably vacant, considering many ...
HDMI excels for media consumption, while PC gamers prefer DisplayPort.
Some (many?) HDMI cables can also carry Ethernet over HDMI. The main use seems to be to provide internet connection to a smart TV from a cable modem box. Currently I have an ethernet-USB adaptor ...
I have a Dell U2720Q monitor that accepts HDMI 2.0, DisplayPort 1.4 and USB-C. I use USB-C because the monitor acts as a hub for a range of peripherals (keyboard, mouse, webcam, speakers, etc.etc) and ...