You can create a task using the button on the right of task lists.This opens a form with two fields: a mandatory task name, and an optional description.
You can create a task from a message in a chat, using the "{{% livechat_label "task_create" %}}" button in the dropdown menu at the right of the message.This will open a dialog box where you can choose which task list you want to add the task into.The task name will be the user nickname, and the task description the message content.
Using this feature, for example, you can ask your moderators to highlight all chat questions, so you can see them at a glance during your livestream, and check them as answered.