Putty is a tool that helps you connect to other computers over the internet. You can think of it as a virtual tube that connects your computer to another computer far away.
When you want to use Putty, you first have to tell it the address of the computer you want to connect to. This address is called an IP address. It's like a phone number, but for computers.
Once you've told Putty the IP address of the other computer, it will start a connection between your computer and that computer. You can then send messages back and forth between the two computers, just like talking on the phone!
Putty is really useful for things like working on computers that are far away, like in a different country. It also helps keep your communication with the other computer safe by encrypting your messages.