Just what it says. I don't do twitter or facebook, and I'd really rather not have "share on these!" show up every time I get an achievement (I was okay with the snaps, but this is getting to be a bit much). Just a little toggle I could flip. You could even keep it as a toggle, so if people just didn't think of tying twitter or facebook or whathaveyou to their Glitch, they'd get that nudge.