Lambda Demos` is a service that simplifies the process of hosting machine learning demos, allowing users to host their Gradio-built demos with just a few clicks using their existing repository URL. The platform provides access to NVIDIA GPUs for training and smaller instance types for demo hosting, catering to both machine learning practitioners and end-users who want to share their work. To use Lambda Demos, users must follow specific requirements, including building the app using Gradio, having a git repository with a README.md file containing certain properties. The service aims to streamline the process of hosting demos and provide an easy way for users to share their models with others, while also ensuring that licensing and permissions are respected.