Astro is a static site generator (SSG) that offers several innovative features, such as generating zero client-side JavaScript by default and allowing users to use any framework or none. It also supports partial hydration for selective component rendering and dynamic Markdown content usage. Additionally, Astro makes it easy to include various types of static assets without configuration. The platform is compatible with LaunchDarkly's Node.js SDK and client-side JavaScript SDK, allowing developers to integrate both tools seamlessly.