In one sentence, describe what the following article is about:

Click the Apple logo in the top-left corner of the screen. A drop-down menu will appear. It's near the top of the drop-down menu. The System Preferences window will open. You'll find this option on the right side of the System Preferences window. It's in the lower-right corner of the window. A new window will pop up. This is at the top of the pop-up window. It's to the right of the "Router" heading near the top of the window.
Open the Apple menu . Click System Preferences. Click Network. Click Advanced. Click the TCP/IP tab. Look at the "Router" address.