Astro add is a convenient CLI tool for helping you set up your Astro projects. You let it know what integrations and adapters you need. Then, it will install any necessary packages for you as well as configure your new features. Integrations add functionality such as React, Svelte and other framework support. They can also help you set up Markdown or Tailwind in your project. Adapters let you turn your static Astro site into an SSR (Server Side Rendered) site. The command is the same whether you are setting up an integration or an adapter: `pnpm astro add react svelte tailwind cloudflare netlify`.