The document provides an overview of key social media trends and tactics for online marketing success. It discusses research showing the massive size of Facebook, rising popularity of video, and growth of mobile. Tactics presented from social media classes include leveraging the Facebook butterfly effect for amplification, using attribution to understand the customer journey, and the power of video marketing showcased through Cisco case studies. The importance of understanding how different channels contribute to conversions is emphasized for accurate measurement of multi-channel campaigns.