This document provides best practices for mobile sites, including:
- By 2016, 1.5 billion people are expected to shop via mobile commerce and mobile shopping is growing rapidly. 
- Google plans changes to ranking to address sites misconfigured for smartphones.
- The document discusses responsive, separate URLs, and dynamic serving as mobile setup options and their pros and cons from an SEO perspective. 
- It provides tips for mobile site architecture selection and optimization including image sizes, page weights, and canonical markup.