YouTube is a website that allows users to upload, view, and share videos. It was created in 2005 by Jawed Karim, Steve Chen, and Chad Hurley. Anyone can post videos as long as they do not contain nudity, pornography, harassment, or commercial content. YouTube has become hugely popular and important for entertainment, communication, and self-promotion online. It helped launch the careers of many celebrities and is used by politicians and organizations to share messages.