MrBeast, whose real name is Jimmy Donaldson, is a popular YouTuber known for his philanthropic and attention-grabbing stunts. He gained immense popularity through his videos where he performs large-scale challenges, donates large sums of money to individuals or charities, and orchestrates unique events. His content often focuses on helping others and creating entertaining and memorable experiences. As of my last update in September 2021, MrBeast continues to be a significant influencer on YouTube, with millions of subscribers and a dedicated fanbase. Please note that there may have been developments or changes since then.