This document discusses social media and its role and value for brands. It summarizes Mark Ritson's presentation on this topic from an alumni reunion in 2013. Some of the key points made include that while social media can be useful for brands, its impact and value is often overstated. Social media typically accounts for a small portion of digital marketing spending and is a weak driver of direct purchases. The quest for ROI from social media often leads to unrealistic expectations and pressures brands to demonstrate value in ways that are difficult to quantify.