by David Allsop on WordPress.org

Internal tags displayed on the posts list
Set internal tags on posts, pages, or custom post types for easier management.
This plugin allows you to create internal tags, these can then be set on posts, pages, custom post types, etc. Once set, they appear on the list of posts in the WordPress dashboard, aiding your content management.
For example, you could set a tag if a post needs checking by a specific team, needs images adding, needs SEO work, etc.
After installation, you’ll find the settings in Settings > Internal Tags. Choose which post types you want internal tags for. Once enabled on your chosen post types, you’ll see an internal tags menu item under the post types menu in the WordPress dashboard. Click into this to create your tags.
Once you have created a tag, you’ll see it on the right side. Click edit to configure further options, such as setting the tags colors.
Now that you’ve created a tag, it can be set when adding or editing a post. Once a tag has been set, you’ll see it on the posts list.
Help contribute towards the development of this plugin via the GitHub repository.
You can also help translate this plugin into your language.