The terminology can be misleading or confusing. In this case, the term "breakout board" can have two somewhat different meanings depending on context.
The typical CNC meaning of the term "breakout board" is a circuit that takes a 25-pin D subminiature connector input (from the parallel port or 'LPT' output of a PC) and makes each of those 25 pins available at a separate terminal, in order to make it easier to hook up one or more stepper motor driver boards to the parallel port. Such breakout boards may also include extra features such as electronic buffering or optical isolation or relay control circuitry. What this breakout board is breaking out is the pins of the 25-pin D connector.
That type of "breakout board" is not what you have linked to.
Instead, there is another usage of the term "breakout board" that is more commonly seen on electronic hobbyist sites (such as News - SparkFun Electronics) to denote a small circuit board that makes it easier to use specialized integrated circuits by connecting the extremely fine surface mount or pin terminals from the chip to more-accessible printed circuit board terminals (that can easily have wires soldered to them). Some such "breakout boards", such as the one that you linked to, may incorporate additional support circuitry beyond just a single IC. What this type of breakout board is breaking out is the pins of an integrated circuit.
The specific board that you have linked to is indeed a driver for a small stepper motor. It is not designed to connect directly to an LPT port cable, rather you either need to hook up just a few of the wires from an LPT port cable to the step and direction terminals of the board, or you need to use one of the (first definition above) breakout boards to separate out the step and direction wires to terminals which you would then wire up to the step and direction inputs of that (second definition) breakout board.
Hope that makes some sense...