In a network there are files being shared on other computers, either on a file server or another workstation. To get to the files you need from another computer, you can browse the network looking for that computer and then the file that is being shared, which can be time consuming.
Or, you can setup a Mapped Network Drive. What it basicaly is, is a shortcut to a shared file on another computer. This shortcut has a picture of a Harddrive with some wires coming out of it. Your computer will give this Mapped Drive a drive letter and acts alot like a local hard drive. You can see the mapped drive in the command prompt as a drive letter. You can copy files to and from this drive. Your workstation can be setup to automaticaly reconnect to this Mapped drive when your computer reboots.
Hope this helped you out some. Have a good day!