On-Board credit is bonus or "free" money that you can get to spend on your cruise. it is a credit that you can allocate to different things on your cruising vacation. I explore what it is and, more importantly, the 8 best ways you can get more on-board credit on your next (and future) cruising vacations. I then also explore some key watch-outs and what you can and cannot spend it on. These are key to ensure you do not lose any of your on-board credit and spend it in the mist effective and beneficial way.