In this video, I give you a quick, practical introduction to Express.js routing—one of the core pieces of building web apps with Node.js. Express is popular because it’s minimalist and efficient for handling HTTP requests and responses, and routing is where you decide how your server responds when a client hits a specific endpoint. I break down what “routes” really mean: matching an HTTP method like GET, PUT, or DELETE to a path, and then running one or more handler functions when that route matches. I also show the basic pattern I use to define routes: app.method(path, handler), where app is your Express instance. A simple example is a GET route on “/” that replies with “hello world.” Then I cover the stuff that trips people up: Express route paths use path-to-regexp, so parameters, optional parameters, and even regex-style matching can affect what gets matched. Order matters too—Express stops at the first match it finds. Finally, I emphasize error-handling middleware so your app doesn’t crash when a route handler throws an error. If you get these fundamentals right, your Express apps become way more robust and easier to grow.