Sean Parker is an American entrepreneur and investor best known for co-founding the file-sharing service Napster in 1999. This platform revolutionized the music industry by allowing users to share and download songs for free, leading to significant changes in how music is distributed and consumed. In addition to Napster, Parker played a crucial role in the early development of Facebook, serving as its first president. He has also invested in various startups and initiatives, including Spotify and Airtime, and is known for his philanthropic efforts in areas like public health and education.