Before someone can really assist you, you should
- read and understand the forum rules (see the link in my signature) - this will give you an idea what information you should give at least so that we could assist you
- Coming to your project:
- Tell us what you really want to achieve in your project or what exactly is your task?
- the selected motor driver can drive up to 2 very powerful DC motors with a lot of Amps needed
- do you already have one or two DC motors? (If so: pls post a link to the specification/datasheet)
- do you have already a power supply for your project?
- what Arduino type will be used (Uno?) ?
- do you have a schematic how to wire the shield with the motor(s) and power supply?
- what shall the Arduino sketch do? Are there additional input signals (buttons, sensors) which you didn't mention yet or is your project just about let the motor(s) turn at a given direction and speed?