ELI5: Explain Like I'm 5

Transfer operator

A Transfer Operator is like a machine that moves things from one place to another. It can be used to take something from one system and send it to another. For example, if you wanted to take money from your bank account and put it in another bank account, you could use a Transfer Operator to do this. It also works with other kinds of information, like electricity or data, and it can transfer it from one place to another over the internet.