According to the FAQ of meta, users with 500 rep can “vote to close, reopen, or migrate any questions.” Since my rep is below 500, I do not know what exactly means by “migrate” a question. However, I have seen a question on meta.stackoverflow.com which was migrated from stackoverflow.com, and I assumed that it was possible to migrate a question between the parent site and the meta site.
This question had been somehow posted on meta instead of the parent site. I had thought that it should be migrated to the parent site, but it was closed instead. Why wasn’t it migrated to the parent site?