WP AutoTags is a free WordPress plugin designed to enhance article tagging efficiency. It automatically adds relevant tags to posts that lack them, utilizing a keyword extraction method based on the TF-IDF algorithm. This feature ensures that every time a post is saved, the appropriate tags are appended, streamlining the content management process for users. The plugin is particularly beneficial for those who frequently publish articles but often forget to set tags manually.

The TF-IDF interface supports both English and Chinese languages, although it has limitations when searching for existing tags within WordPress. Users can configure the plugin through the 'Settings > Writing' menu in the WordPress dashboard. WP AutoTags is compatible with PHP versions 5.5 and above, making it a suitable choice for various server environments while ensuring that it adheres to the latest WordPress updates.