A knugget is a knowledge nugget. A small piece of useful information designed to help somebody out. We see them every day on our website. When somebody takes the time to answer a newbie's question in the forum, that's a knugget. Or when a power user posts an alternate workaround to a bug that already has a perfectly good workaround, that's a knugget. Or when a partner discovers a new method for loading opening balances--and writes about it in our Admin and Setup docs--that's another knugget.
Knuggets are like gold in an open source community. When you find the one you're looking for, you're set! Hopefully the improved search features of our new website are making it easier for you to find the knuggets you're looking for. And if by any chance you're interested in contributing content (we'd welcome more content contributors!), please let us know and we'll plug you in.