Just 'interesting', 'important' or 'relevant' here, I think. Your context reveals nothing more.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
soheil1a revealing notionan idea you can learn from (because it reveals something to you)
soheil1What would you develop?It reads ...to develop and explore.the revealing notion
soheil1So why not just brilliant idea?Because that's not the way the author wrote it.