This is a comprehensive guide on building an Angular site that grabs data from Sanity.io, a headless CMS, using Netlify Functions and Build Hooks. The project starts with a pre-rendered Angular site template, sets up a headless CMS with Sanity.io, and then adds an Angular Service to handle the incoming data. The service is used to create and update Angular components to display the data. A build hook is set up to update the page when new data is added. The project demonstrates how to use Netlify Functions, Build Hooks, and Angular Universal for pre-rendering. The guide also covers setting up a build hook with Sanity.io, creating a hook, and testing it.