Social media has become a dominant online activity, with over 1.83 billion hours spent on social networks and blogs each day, accounting for 22% of total time online. Key metrics include that 500 million people are active Facebook users, with 700,000 new users added daily. Twitter receives 800 million search queries per day and has 85 million tweets sent daily. YouTube serves over 2 billion videos each day. Social media has transformed how information spreads and has become a major force for influencing opinions, as demonstrated by Barack Obama's successful use of platforms like YouTube and Facebook to engage millions of supporters in his presidential campaign.