Remix is a full-stack web framework based on React that uses distributed systems for deployment. It differs from client-only frameworks like React in how it loads data from the server and pre-renders web pages. This tutorial guides developers through setting up a Remix project with Agora Web UIKit, an open-source video calling library. The setup includes creating a new Remix project, installing the necessary libraries, and configuring Agora credentials. The main focus is on creating a dynamic route for video calls using nested routes in Remix. This tutorial also provides information about joining the Agora Developer Slack community for support and contributing to the project on GitHub.