How to Explain the Internet to an Alien

There's something else you can use in a similar way and that's let's say. So for example, imagine an alien comes to earth and says, Craig, what's a, what is the internet? Well, it's like a way of communication, if you will, or it's a way of people speaking to each other who live a long distance from where you are,. If you will. It provides a wall, if you'll, a security so that you can exercise that which you already possess by being human. And also I noticed that some native speakers are saying instead of let's say, they just say, say, they are using just the word say.