From the Code of Honor:
Newsvine's primary purpose is to provide a place for people to share and discuss topics relating to the news.
Right from the beginning, one of the hot topics on the site has been the site itself. Meta content has been some of the most important and popular content on Newsvine.
Now, we've got a place for those articles and seeds: the 'Not News' section. Content published to the 'Not News' section won't show up on the front page, but it will everywhere else. This will make for a more focused front page but still allow - and hopefully encourage - inventive uses for Newsvine.
From now on, Meta articles can be published to 'All of Newsvine', replacing the old Meta policy, but must be published to the 'Not News' category. This allows more visibility for Meta articles than the former method.
If you have examples or questions about what should go where, ask here and administration will discuss them with you.