This article explains what USB ports are, the different types available, and what you can connect to them.
PC USB Ports Explained
A USB port is a standard cable connection interface for smartphones, computers, and other consumer electronics. USB stands for Universal Serial Bus, an industry standard for short-distance digital data communication.
USB ports allow USB devices to be connected to each other and to transfer digital data over USB cables. They can also provide electrical power through the cable to devices that need it.
There are both wired and wireless versions of the USB standard, although only the wired version uses USB ports and cables.