Requirement prioritization is when you look at all the things that you need to do and decide which one is most important. It's like a to-do list, but you decide which tasks should be done first. For example, if you had 3 tasks - cleaning your room, doing your homework, and going to the store - you would prioritize them. Cleaning the room might be the most important, so you would do that first. Then you would do your homework, and then go to the store. This helps you get things done in a logical order.