Unlisted means your post/page will not come up in search results or on anywhere else on your site. Only those who have the link of the post can view it just like any normal post on the site. The Post could still be seen by anyone, but only if they guess the link! The plugin updates MySQL query directly in WP_Query class of WordPress to leave out the posts which are unlisted by the user. As this modifies the core WP_Query, this also works very well with all the plugins which pull out posts/pages from database by using WP_Query, For eg. Posts slider plugins, Advanced Posts in Ultimate Addon for...
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