The express js framework work on a single thread, with the help of express, we can build server-side as well as client-side application using any template engine, it provides lots of features that we can easily build any application.

The best thing about Express.js is the easy to understand MVC structure and built in express modules like express fileupload and the express.Router() for routing in your application.

Express has a lot of flexibility and an effortless learning curve. Once you understand the basics, you can quickly implement and maintain any folder structure. The best part is the availability of middleware for express and those that come inbuilt, for instance, the express.json middleware, which has replaced the body parser.