Astro is a new static site generator that helps ship less client-side JavaScript in projects, and it's centered around helping developers deploy their sites seamlessly on Netlify. Astro allows users to write JavaScript, HTML, and CSS in .astro files and integrates with popular front-end frameworks like React, Preact, Svelte, Vue, SolidJS, AlpineJS, and Lit. Users can start a new Astro project using the Astro CLI or browser-based development environments like StackBlitz, CodeSandbox, or GitPod. Once set up, users can deploy their site to Netlify in three ways: static sites, server-rendered sites, or edge-rendered sites. Each deployment method has its own benefits and requirements, and users can choose the one that best fits their project's needs. With Astro and Netlify, developers can create fast, modern web applications with minimal JavaScript code and deploy them easily to a live URL.