Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. Built by experienced developers, it simplifies the complexities of web development by providing a robust set of features right out of the box. Key benefits of using Django include:

1. Scalability: Django is capable of handling high traffic and large amounts of data, making it a great choice for both small projects and large-scale applications.
2. Security: With built-in security features, Django helps developers avoid common web security pitfalls such as SQL injection, cross-site scripting, and more.
3. Community Support: Being an open-source framework, Django benefits from a large and active community, providing extensive documentation and third-party packages.

Understanding Django means recognizing its significance in the Python ecosystem. As a full-stack framework, it allows developers to focus on writing applications without worrying about the underlying infrastructure. The Model-View-Template (MVT) architecture of Django makes it easier to separate data, business logic, and presentation. Furthermore, Django's admin interface is one of its standout features, providing a user-friendly way to manage application data. By harnessing the power of Python, Django not only enhances productivity but also ensures that web applications are maintainable and scalable over time.

Django is a powerful web framework that provides a multitude of features to streamline the development process. Here are 10 essential Django features that every developer should know:

1. Admin Interface: Django comes with a built-in admin interface that allows developers to manage application data effortlessly.
2. ORM (Object-Relational Mapping): With Django's ORM, developers can interact with the database using Python code instead of SQL, making database operations more intuitive.
3. URL Routing: Django simplifies URL routing, enabling developers to create dynamic URLs easily and map them to views.
4. Migrations: Django automatically manages database schema changes through migrations, ensuring that the database stays in sync with application changes.

5. Security Features: Django has built-in security measures like cross-site scripting protection, SQL injection prevention, and CSRF protection, making it a secure choice for web development.

6. Templates: The Django template engine allows for the separation of presentation and logic, enabling developers to create highly dynamic HTML pages.

7. Form Handling: Django simplifies form handling with its forms framework, offering built-in validation and easy rendering of HTML forms.

8. Flexible Settings: With its modular settings management, developers can easily customize their application’s settings according to different environments.

9. Middleware Support: Django's middleware framework allows developers to process requests globally, adding customs processing for security, performance, and more.

10. Scalability: The framework’s architecture allows for scaling applications effectively, accommodating growing traffic without major changes.

Building your first web application with Django can be an exciting and rewarding experience. Before you begin, ensure you have Python installed on your system, as Django is a high-level web framework that relies on it. Start by creating a virtual environment to keep your project dependencies organized and manageable. After setting up your environment, you can install Django using pip with the command pip install django. Once Django is installed, you can create a new project using django-admin startproject your_project_name. This command will generate the necessary files and structure to set the stage for your web app.

After initializing your project, the next step is to create an app within your project using the command python manage.py startapp your_app_name. Each app serves a dedicated purpose, enhancing modularity in your web application. With your app created, define models, views, and templates. A model can be created by defining a class in models.py, which corresponds to your database structure. Use python manage.py makemigrations and python manage.py migrate to apply changes to the database. To complete your web application, set up URL routing in urls.py and create HTML templates to render your content. Following these steps, you'll have a basic functioning web application powered by Django.