Social media is a broad term that includes digital tools allowing users to share information. 222 million people use blogs and over 200 million use Facebook. Usage of social media cuts across all age groups, with the majority of those aged 15-65 using Facebook and Twitter. Organizations that are more active on social media platforms like Facebook and Twitter see higher rates of follower growth. Measuring metrics like actions from fans and followers can help evaluate the return on investment of social media marketing.