Yes, having a way to denote a (saved) connection as metered. The specific use case that I'm thinking of is that I've got a laptop that has odrive on it. At home and the office, the wifi/lan connections are unmetered and I don't care about how much data is transferred. However, at the coffee shop using my cell phone as a hotspot for a connection that has only so many GB/mo, I don't want odrive to sync anything unless it is explicitly requested by me. I also want odrive to detect that same hotspot connection in the future (after flagging it as metered) so that I don't have to flag it every time or disable odrive every time that I'm on that hotspot. Much like you can do with Windows 10 so it won't d/l updates over your metered wifi connections.
Does that help explain it a little more?