Xfinity Stream is a streaming service offered by Comcast, allowing users to watch live TV, on-demand shows, and movies on various devices. It is available to customers with an Xfinity TV subscription, providing access to a wide range of channels and content. The service can be accessed through a web browser or mobile app, making it convenient for users to enjoy their favorite programs anywhere with an internet connection. Additionally, Xfinity Stream offers features like cloud DVR, enabling users to record shows and watch them later at their convenience.