Using this Micro: bit GPIO expansion board is a breeze. First, just insert the expansion board directly into your Micro: bit. It's as simple as that! When you want to expand further, you can cascade multiple expansion boards together. As for maintenance, keep it in a dry and clean place to avoid any damage. And when you're handling it, be gentle to prevent any physical harm. Remember, this board is a great tool for making your Micro: bit more functional and easier to operate.