Articles can only be posted into a Newsroom.
This helps provide context to the article.
There are several ways to find a relevant Newsroom for your article.
You can create your own Newsroom (from within your profile menu.)
You can search the topic and see if there is already a public Newsroom for your post.
You can browse the top 25 categories for a relevant Newsroom. (from the main screen.)
To learn more about how to post an article… click here.