Making Mobile-Friendly Websites:
See The 10 Best Practices in Action
Video Refresher On "Making Mobile-Friendly Websites: 10 Best Practices in Action"
(Video published Nov 2011 but main principles still applicable and examples totally relevant.)
To get straight to the 10 best practices watch the video starting at this point
Here's Abit of History Straight From Google Developers:
How Google Developed a Mobile-Optimized Website for google.com/mobileads
Visit Playlist for More from GoogleMobileAds
For Google's Comprehensive Mobile SEO Guide Go Here:
Developers.google.com/webmasters/mobile-sites
Related Post: Google Mobile-Friendly Algorithm Update 21 April 2015 Discussion
