Is there a new status symbol on gmail?

OK I don’t don’t know for sure if it’s called a status symbol, but I’m talking about the little green or grey dot (OK, there’s a red one, too, but it’s so uncommonly used) next to the contact’s names. So anyway, I was just on Gmail and I saw a new one next to one of my contact’s names. It was a green rectangle with a green triangle directly to the right of it (touching). So have any of you guys seen it? Do you know what it means? I can’t figure out how to make it my status symbol, and I can’t see any type of explanation on there.