Personalization is a key aspect of creating customized experiences for website visitors in 2022. Shipping less client-side JavaScript is also a significant topic, with new front-end frameworks like Astro and Eleventy aiming to reduce the need for JavaScript by default. Netlify Edge Functions enable dynamic personalization without requiring client-side JavaScript, offering a great developer experience and better end-user outcomes. With Edge Functions, developers can intercept HTTP requests, transform responses on the fly, and return updated responses to browsers. This allows for personalized experiences without relying on browser JavaScript. The tutorial demonstrates how to use Netlify Edge Functions to add personalization to static HTML with no browser JavaScript required, making it a valuable tool for reducing client-side JavaScript in the browser while still providing a personalized experience for users.