Routes describes the interfaces for making requests to your web app. Combining an HTTP
request method and a path, you define URLs in your app.
Each route has an associated route handler, which does the job of performing any
action in the app and sending the HTTP response.
Routes are defined using an HTTP verb and a path pattern. Any request to the server
that matches a route definition is routed to the associated route handler.
Route handlers are middleware functions, which can send the HTTP response or
pass on the request to the next middleware in line. They may be defined in the app
file or loaded via a Node module.
For More Information : Express Web Application Development
Issues Related to Express Router : Express3.0
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