Tsuru is a platform as a service (PaaS) that provides typical PaaS features like infrastructure, a Docker registry, router, and auto-scaling in a robust and developer-friendly way. It allows for zero downtime deployments, auto-healing, and centralized logging through its API and works with Docker, Git, and common platforms and services. Users can get started by downloading Tsuru, logging in, creating an app, and pushing code to deploy it with features like fast deploys and centralized logging.