Hey there, coding enthusiasts! Today, we're delving into the exciting world of single-page applications (SPAs), with a key focus on navigation. If you're wondering what an SPA is, think of Facebook. When you navigate from your news feed to your profile or to your messages, the entire page doesn't refresh, only certain parts do. Traditional browser navigation doesn't quite apply here. That's when we whip out our secret weapon: the React Router, the Narnia's wardrobe of SPAs.

Inside every React Router app, there's a key BrowserRouter component. This key component essentially keeps the user interface in sync with the URL on the browser.

Routes are managed using a Routes component that contains Route components for each path in our application. The Route component matches the current location with its path prop and generates the corresponding UI. For instance, the root of the app renders the HomePage and "/about" renders the AboutPage.