Mark Fischbach, known online as Markiplier, is an American YouTuber and content creator famous for his gaming videos and comedic commentary. He launched his YouTube channel in 2012 and quickly gained popularity for his engaging personality and entertaining gameplay, particularly in horror games. In addition to gaming, Markiplier has expanded his content to include vlogs, sketches, and charity livestreams. He is recognized for his philanthropic efforts, raising millions for various causes through his platform. With millions of subscribers, he remains one of the most influential figures in the online gaming community.