Improves your blog’s search engine optimization by “noindexing” pages you choose.
Add the noindex robots meta tag to archives, categories, search pages, tags, author pages, login, admin pages or any other page you choose.
Add the rel="nofollow" attribute to individual pages listed by the wp_list_pages function or the Pages widget. Also, add the rel="nofollow" attribute to archive links, category links, registration and login links.
Written by Jon Kemp, currently maintained by Kilian Evang.
Usage
After installation, the settings page for this plugin can be found in your WordPress administration interface under Settings → Ultimate noindex.