It’s a big deal. Big enough that the people who know about it need you to know that they know, but it’s also important that you know that it isn’t so big that you should care much. So it’s really a little deal. But it’s big enough that they can’t tell you or their sources if the little deal would be upset.
It’s very medium. It’s a medium sized deal.
Well, when the person asks you not to say anything specific, then there you go.
I really should just have zero integrity on any level and when someone tells me something I immediately reveal exactly what it is and who told me, because that is totally the way to keep having people give you info from time to time (even if the info isn't any big deal) and build trust.