Oprah Winfrey is an American media mogul, actress, talk show host, philanthropist, and producer. She is best known for her talk show, The Oprah Winfrey Show, which was the highest-rated television program of its kind in history. Winfrey has used her platform to advocate for numerous social causes, including education, literacy, and gender equality. She has also established the Oprah Winfrey Leadership Academy for Girls in South Africa, and has donated millions of dollars to charities around the world. Winfrey is one of the most influential and successful women in the world, and her influence continues to be felt in the media, entertainment, and philanthropic industries.