Hi @eac2015 !
By default, they can be seen by the public in several ways:
1. Tag Archive Pages
Each tag in WordPress has an archive page that lists all posts associated with that tag. These pages are accessible through URLs structured like this: https://yourdomain.com/tag/tag-name/. You would need to disable these pages.
2. Tag Listings in Themes
Some WordPress themes automatically display tags on posts. Even if you are not actively listing them, certain themes or plugins might show tags in meta information of posts, such as below the post content or in the sidebar. You would need to audit all of your templates and any templates that display the tags.
3. Search Engine Indexing
If search engines have indexed your tag archive pages, users can potentially find these pages through search engine results. You would need to modify your SEO settings (including the robots.txt file) to prevent the search engines from indexing the tag archive pages.