The document discusses measuring return on investment (ROI) for marketing campaigns. It defines ROI as the gain from an investment minus the cost, divided by the cost. The document notes traditional media is measured by reach and frequency, while objectives for marketing include brand awareness, engagement, and word-of-mouth. It also discusses measuring customer investments in connection, creation, consumption and control of content. An example is provided of a successful marketing campaign for Square Enix's Dragon Quest 8 that saw 30% of its online community recruited through word-of-mouth, 40% pre-ordering the game, and 510,000 units sold.