DW interface question

After seeing several posts on my reading page about access list editing, I went to the DW "Manage Circle" page myself to see how many inactive journals are in my circle (kind of depressing to see), and I noticed the second column in that table, that either has an asterisk or not, and I have no idea what that signifies. I don't remember whether I knew at some point and forgot, or just never noticed before, but now I'm wondering about this. What is that column?