All conversations begin by hosting or joining a topic. Topics are a starting point for a conversation. Join an existing topic hosted by another person, or inspire a new conversation by creating your own.
The "Join" button matches you with the next available host for a conversation on the shown topic.
The "Host" button under the topic listing allows users to create a copy of the topic shown.
The "Share" button will allow you to share a link to the given topic for conversation.