Okay kiddo, let me explain Rayo's number to you. Rayo's number is a really big number that a guy named Rayo came up with. It's so big that it's like a gazillion times bigger than any number you can think of!
To understand it, let's think about numbers. We know that numbers keep going on and on, right? Just when you think you’ve reached the biggest number, you can always add one more. So, when we talk about big numbers, we mean numbers that are really, really, big.
Now, Rayo's number is a number that is so huge that it's impossible for a human to really comprehend how big it is. Some people say it's too big to even write down, because there isn’t enough space in the entire universe to write out all the digits.
The reason why Rayo's number is important is that it shows us how big numbers can really get. It's like a reminder that no matter how big we think a number is, there's always a bigger one out there.
So, to sum it up, Rayo's number is a BIG number that a guy named Rayo came up with and it's so big that we can't even imagine how big it is.