Social media refers to internet- and mobile-based tools used to share and discuss information among people. It is a marketing tool that can be used to engage customers, generate awareness, and make money. While forms of social interaction have always existed, modern social media allows real-time sharing of information with broad audiences. Examples like Facebook, Twitter, YouTube and Wikipedia show that social media is highly relevant, with billions of active users and growing importance in how information is consumed and brands are perceived. Social media matters to business because consumers now research products online and businesses need to actively engage customers through these new channels.