YouTube now includes a Live Q&A tool that allows you to hold dedicated question and answer sessions during livestreams.
When you start a Q&A as a creator, your prompt appears as a pinned message at the top of your stream’s conversation, and viewers may then submit their questions. When you locate a subject you’d want to discuss, you may pin it so that it’s prominently displayed and everyone knows what you’re replying to. To proceed, pin another question, and it will replace the one at the top of the list. When you’re through with the Q&A, you may return to a regular chatroom.