I was reviewing a user's first answer today, and that was when I noticed this line:
This is a new user's answer to an old question. Watch for hidden gems, non-answers, and spam.
What does the hidden gem
mean?
"Hidden gems is an idiom which means something which is extremely outstanding and not many people may know about"
See https://english.stackexchange.com/questions/237652/whats-an-alternative-for-hidden-gem