Manage your audience by adding people as members to a space or directly to a thread as a guest.
A member is someone who has been added to a space. Members will automatically be added to any thread that is started in that space.
A guest is someone who is directly added to a thread. A guest will be able to view, edit, and respond to the thread they've been added to, but they won’t be able to access any other threads in the space the thread is in.