ELI5: Explain Like I'm 5

Session ID

Okay kiddo, so imagine you want to buy something from a store online. That store needs to know who you are so they can put your things in your shopping cart and charge your credit card. But they don't want just anyone to be able to see your information or buy things with your money.

So, they give you a special code, called a session id. It's like a secret password that only you and the store know. When you put things in your shopping cart or type in your credit card number, that session id is like a signal to the store that it's you, and not someone pretending to be you.

But here's the important part - that session id is only valid for a certain amount of time, usually until you close your browser or log out. That way, if you forget to log out and someone else tries to use your computer, they can't still get into your account because the session id has expired.

So, a session id is a code that keeps your online shopping and information safe and secure, and it only works for a short amount of time. Cool, huh?