h5bp/html5-boilerplate — pull request #1504 by abhinayrathore (2014-01-30 17:34:45+00:00)
Title: Alternate link to the mobile version page for SEO

Websites with separate URLs for desktop and mobile websites should have an alternate link on desktop page pointing to the mobile page for SEO.
More Information:
https://developers.google.com/webmasters/smartphone-sites/details#separateurls
https://developers.google.com/webmasters/smartphone-sites/feature-phones