Just in case it wasn't clear from all the replies here, using an unknown rel-attribute on links doesn't do anything, and since the default behavior is to use links normally, this just treats links ...

Google updated their rel canonical documentation in order to clarify how Google handles the extraction of rel canonical annotations. The clarification is not meant to ...

Google has updated its favicon documentation for Google Search to add definitions for each supported rel attribute value in the Google Search favicon documentation. Google said it added these details ...

Internal and external links are essential topics every SEO must learn. Links send users to external sites or can be used internally to keep people on your site and help search engines find more of ...