Artifact is a hyper-personalized newsfeed app that uses machine learning to curate content based on user preferences. It starts by understanding the user's interests and then presents a feed of relevant articles, news, and blogs. Over time, the app learns the user's preferences and serves them content that matches their interests, even if they haven't explicitly stated them. The app provides a customized news experience and evolves from being a simple news reader to a personal virtual assistant, similar to having a valet who finds and delivers the most interesting content to the user.