Adds the rel=”ugc” attribute value to links in comments and author URLs. This way the search engines will know that the links in the are added by users (User Generated Content).
Currently the plugins adds the value ugc after the nofollow value. Not all SEO tools and search engines are up-to-date and actively supporting the new attribute values.
This plugin won’t get further updates as WordPress 5.3 has the exact same attribute values implemented (nofollow, ugc).