Social media allows users to create and share content while participating in social networking on interactive websites. There are over 3 billion social media users worldwide, with the most popular sites being Facebook, YouTube, and Twitter. Facebook has over 2 billion users who log on daily, YouTube has over 1 billion users who watch billions of videos each day, and Twitter sees 500 million tweets sent daily. Social media is increasingly being used by businesses, with 91% of retailers using multiple channels and $74 billion spent on social ads in 2018 alone.