A pre-made concept is approximately 500-800 words of an idea for your next book. It will include some of the story and then will have questions are the end like mini-cliffhangers to help you decide where you want to take the story. These go on sale every night at 8pm GMT / 3pm EST. There could be anywhere between 2 to 4 pre-mades being sold every night. Once you have bought a pre-made concept it is YOURS to do with as you please. You may never use it, you may use some of it, you may change it or you may use it exactly as it is. But it is YOURS to do whatever you want with.