About the Plugin
Sometimes you may want to have a post publically available, but not listed on any post listings like the blog archives. By unlisting a post, it won’t show on any post lists but will be visible to those that have a link to see it.
In the event that you use a custom query to show posts on your blog, you can use the
unlisted_post_query filter which will let you alter the query containing the unlisted posts.
Please start a new topic in the WordPress support forum and I’ll try to answer your question as soon as I find the time.
The setting that is shown on the edit post screen.
The column that is added to the posts list table.