If your analysis a WordPress category, you will see a word category associated with URL link structure. The order of such a link will be like http://www.domain.com/categoy/catergory name/. These category links look fine in appearance, but it would slightly alter the seo or search engine positions of associated WordPress posts. We can remove the word category from WordPress category URL by .htaccess method or by using plugins. However, using .htaccess it is a little difficult for first time WordPress users. So here we introduce you to plugin Top Level Categories, that can do this without many hassles.
Nofollow is an HTML attribute that instruct search engines not to crawl the link to which it is attached. Comment author URL in WordPress, Blogger and all other CMS are nofollowed by default. This prevents spammers from gaining search engine advantage by just commenting on any of these blogs. I personally use a Firefox addon called nodofollow to differentiate from dofollow and nofollow. The addon will highlight nofollow links with a light red color. Recently after installing WordPress in downhub.com, I found that all external links on the blog are nofollow. So that means none of my blogs posts will be crawled by Google and other search engines. This happens sometimes when we install WordPress. Inexperienced users who don’t know about nofollow will left them unfixed, leading to long term search engine traffic lose. So here is how you can Fix all links nofollow issue after WordPress installation.