On which SE should I ask a questions if I don't know which is the right place for it.
For example, I asked a question on Stackoverflow about websites with programming challenges (recommendation), because I couldn't find a website recommendation SE (like software recommendation) and thought it would fit into SO, but it didn't.
Second questions to this topic: Why are some normal questions put on hold because of off-topic when they are completely normal. First, as a new user, I was very insecure if my questions is right in that SE.