Local control of your BBB should always be supplemented with the ability to control it remotely. There are a variety of reasons you may want to do this. For example, you may want to operate the device from one location while you are in another location.
The primary and most typical reason for remote access, however, is to run the board headlessly. This means running it without a display, keyboard, or mouse. Headless control is, in fact, the way I operate the board about 99 percent of the time. I rarely even use an external monitor with the BBB since it requires fewer pieces of hardware and reduces headache.
There are two basic recipe types for remote usage: