In layman's terms, a router is a device that takes your incoming internet connection and "routes" the signal to various devices including your computers. To use one, you do this:
1. Connect your incoming internet connection to the router's input connection.
2. Connect your device (computer) to the router using one of the following:
a. Connect the router to your device using a network cable connected to the router's output jack, and your computer's network jack. You will need a network cable with the appropriate plugs for your computer and router.
b. If BOTH the router and the computer provide wireless capabilities, you will need to configure a wireless network before they will connect. If only one or the other offer wireless capabilities, you will have to use a hardwire connection as in "a" above.