1. Robust Routing: Express.js provides a robust routing mechanism. Routes are the different paths that a user can navigate to in your application. Express.js allows you to handle different routes with different HTTP verbs.

2. Middleware Support: Middleware are functions that have access to the request object (req), the response object (res), and the next middleware function in the application’s request-response cycle. Express.js uses middleware to handle requests, which simplifies the process of writing handlers for different types of requests.

3. Template Engines: Express.js supports template engines. A template engine enables you to use static template files in your application. At runtime, the template engine replaces variables in a template file with actual values, and transforms the template into an HTML file sent to the client.

4. Simplified Multiple Routing: Express.js simplifies the process of defining multiple routes and handling different HTTP requests at different routes.

5. Database Integration: Express.js can be easily integrated with various databases like MongoDB, MySQL, Redis etc. This makes it easier to store and retrieve data from the database.

6. Good Support for REST API: Express.js provides a simple interface for building RESTful APIs. This allows you to build interfaces that can communicate with all kinds of clients in a standard way.

7. Performance: Express.js is built on Google's V8 engine, which makes it fast and efficient.

8. Easy to Learn: Express.js is easy to learn, especially if you're already familiar with JavaScript. It's also well-documented, with plenty of examples and tutorials available.

Question

1. Robust Routing: Express.js provides a robust routing mechanism. Routes are the different paths that a user can navigate to in your application. Express.js allows you to handle different routes with different HTTP verbs.

2. Middleware Support: Middleware are functions that have access to the request object (req), the response object (res), and the next middleware function in the application’s request-response cycle. Express.js uses middleware to handle requests, which simplifies the process of writing handlers for different types of requests.

3. Template Engines: Express.js supports template engines. A template engine enables you to use static template files in your application. At runtime, the template engine replaces variables in a template file with actual values, and transforms the template into an HTML file sent to the client.

4. Simplified Multiple Routing: Express.js simplifies the process of defining multiple routes and handling different HTTP requests at different routes.

5. Database Integration: Express.js can be easily integrated with various databases like MongoDB, MySQL, Redis etc. This makes it easier to store and retrieve data from the database.

6. Good Support for REST API: Express.js provides a simple interface for building RESTful APIs. This allows you to build interfaces that can communicate with all kinds of clients in a standard way.

7. Performance: Express.js is built on Google's V8 engine, which makes it fast and efficient.

8. Easy to Learn: Express.js is easy to learn, especially if you're already familiar with JavaScript. It's also well-documented, with plenty of examples and tutorials available.

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