This is where you determine who should get to see your mblog and who can make changes to it besides yourself.
A photographer, for example, can collaborate with a writer to produce a mblog. If you're the photographer with primary responsibility for the mblog, you can use this field's "Add" button to add a writer from the contributor database in Picture A Thought.
While the two of you are developing the mblog, you should select the "Private listing" option until the mblog is ready for showtime. That means the mblog will not be listed in our public database, but you and the editors you designate can see it and edit it by just going to the mblog directly via its URL.
You can mark a mblog as a "Private listing" even after release if you want it to be viewed only by the people you invite by sending them the mblog's URL.