Description: A route group in Express.js is a tool that allows for the efficient organization and management of an application’s routes. This functionality is especially useful in large and complex applications, where the number of routes can become overwhelming. By grouping related routes, developers can keep their code cleaner and more modular, making it easier to read and maintain. A route group is defined using the `Router()` method from Express, which creates a routing object that can contain multiple routes and middleware. This not only improves code organization but also allows for specific middleware to be applied to a set of routes, which can be useful for authentication, data validation, or error handling. Additionally, route groups can be easily imported and used in different parts of the application, promoting code reuse and separation of concerns. In summary, route groups are a key feature of Express.js that contributes to the scalability and maintainability of web applications.
