This question is an exact duplicate of:
The review system is pretty nice, but I've noticed that there are a huge number of questions pending closing and it's rising over time. Right now, there are 59.5k questions awaiting close votes in the review queue.
I don't know the statistics behind close vote turnover, but I'm curious about whether it's working well enough. Obviously not all questions awaiting close votes should actually be closed.
Is the question that is selected for review random or are some priorities in place? Could the question selected for review be improved by, for example, selecting questions with multiple downvotes in preference to more highly rated questions or by selecting questions with more close votes over those with one?
The concern and motivation for my question is that if the questions are poorly selected for moderation or they're just random, any given question will sit in the queue and rarely actually be closed, especially if users are less frequently moderating based on the front-page question selection.
Has the review system created a behavioral change such that most moderation time is spent looking at (random?) questions in the close queue rather than multiple people noticing something on the front page, resulting in many questions with one or two close votes and infrequent successful closes?
A minor corollary is that not much close queue moderation appears to be taking place. Can something be done to encourage more close moderation?