Help Quests and Nation Building?

[pluvian_penguin]

Hey all! I checked the FAQs and didn't see any definitions, but maybe I missed a page? First time on Xenforo and I'm still figuring things out. My question is what quest and nation building interest checks are for, basically. Are they usually for 1x1? Groups? What differentiates them from other interest checks? Is there a specific endgame? Thanks in advance!