Having been a member of Stack Overflow for a year, I have participated in reviewing close votes and flagging questions if I found any duplicates. However, I don't understand the purpose of closing a question. As per myself, the main purpose is keeping the site clean and make a better place.
- I still see closed questions on the site that are a year old. When will these questions be deleted?
- Also, when a question/answer does get deleted, it is still visible to 10k users, even if it is deleted by the owner.
Every day I participate in reviewing close votes, but the question arises why we are preserving these questions and answers even after they are closed.