The document discusses the massive scale of user generated content on social media platforms and how companies use these platforms for digital marketing. It notes that over 200,000 videos are uploaded daily to YouTube, 5 million tweets per day on Twitter, and 3 million images uploaded daily to Flickr. Google uses around 900,000 servers to power these platforms. The document also discusses how Google Adsense earned $10.65 billion in the first quarter of 2012, a 24% increase from the previous year. It details some common types of digital ads and sponsored content used for marketing on social media.