DisplayPort has taken over as the superior choice for connecting a PC to a display. This is largely because DisplayPort was designed with PCs in mind, and that shows in how it behaves in real-world ...
USB-C offers a convenient single-cable solution for connecting a laptop to a display, but HDMI is still the more common cable ...
HDMI is a popular way to stream video and audio via cable, but it's not universal. That's when these adapters come useful.