IRC stands for Internet Relay Chat, and is a way of talking to people online. It works like a big chatroom, where people around the world can join in and talk to each other at the same time. Everyone in the chatroom can see what others are saying, just like in a real-life conversation. You can join an existing chatroom, or create your own and invite people to join. It is a great way to make new friends, or have fun talking and learning about different topics.