Forum:Questions for dueling in an instant chat

What do I need to know for dueling in live chat/IM/etc.? I don't want to commit any feaux-pax or anything....

What is "hosting"? How do you "host"? What is an expert duel? How should I type? Should I insert both player's life points at the end of every time I end my turn? Should I separate turn phases in a certain way? Is it appropriate to send a hyperlink of the card description if my opponent asks for one? Are there any special manners in chatting? Anything else I should know?