An instruction set is like a set of instructions. It's like when you want to make a cake, your mom gives you a list of instructions to bake it. The instructions might be to preheat the oven, mix the ingredients, pour it into a cake pan, etc. Instruction sets are like lists of instructions, but instead of baking a cake, they tell a computer what to do. Instruction sets tell the computer to do things like adding two numbers together, displaying information on the screen, or saving a file. It's like a recipe that the computer follows to do things like calculate numbers or play a game.