These days USB ports in a PC are something essential that you continuously use. Almost all peripheries (whether storage devices, gaming devices, printers, etc) are connected via USB.
But the problem is when only the user who has that device connected to that USB can access its content. To avoid this exclusivity is USB Over Network, which lets you share USB ports via a LAN, so all other PCs connected to that LAN can access the USB ports and their content remotely.
This USB Over Network is the program you must install in the client PC that is going to be shared. In the others on the LAN you must install
USB For Remote Desktop.