MrBeast, whose real name is Jimmy Donaldson, is a popular YouTuber and philanthropist known for his extravagant and charitable stunts. He gained fame through his videos where he donates large sums of money to individuals or organizations in need. MrBeast's content often involves challenges, competitions, and social experiments, and he has amassed a massive following on YouTube with millions of subscribers. He is also known for his collaborations with other popular YouTubers and celebrities.