This document provides guidance for agencies to help their clients build mobile-friendly websites. It includes an introduction on the importance of mobile, a GoMo action plan with steps agencies can take, answers to common client questions, information on how consumers use mobile, and mobile best practices and tools. The action plan guides agencies to educate clients on mobile, assess their current mobile presence, show competitive mobile sites, build sample mobile pages, develop full mobile sites, and integrate mobile into marketing strategies. The document aims to equip agencies to effectively advise clients on capitalizing on the mobile opportunity.