Social media usage continues to grow rapidly. 73% of online adults now use social media, with the highest usage rates among 18-29 year olds at 90%. The most popular sites are Facebook with over 1 billion users, Twitter with 560 million registrants, and Google+ with 400 million users. Marketers are now integrating social data with other customer data to deliver more personalized messaging. Key 2014 trends include a focus on video content, the rise of micro-videos on platforms like Vine and Instagram, and more data-driven marketing across social media and other channels.