IEEE 754 is a way of storing numbers on computers. It tells computers how to make sure that numbers are stored correctly and keep the same value no matter where they are stored or used. It is like a set of rules for computers to follow. For example, if you give a computer a number like 3.4, it will make sure to store it in a way that keeps the same value, no matter if you move the number from one computer to another. This way, no matter where you move the number, you can be sure it will be correct!