This document is an ebook titled "54 pearls of marketing wisdom" that contains advice from various marketing experts on topics related to social media and mobile marketing. It begins with introductory content to help readers determine if the resource is suitable for their experience level. The ebook then poses several questions to the marketing experts and includes their responses on pages 6 through 19, addressing topics such as surprises in social media in 2011, planning for long-term mobile strategies, and allocating resources across social networks.