Social media refers to online tools that allow users to create and share content. It enables a "democracy of information" where users can generate and distribute content, unlike traditional media which was focused on distributing information to passive audiences. Social media has revolutionized how information spreads, allowing some platforms to gain 50 million users within only a few years which was much faster than traditional radio and television. If Facebook was a country, it would be the third largest country in the world based on population size, showing the massive scale of user engagement on social media platforms.