Writing your first Django app. https://docs.djangoproject.com/en/2.2/intro/tutorial01/

These files are:

The outer mysite/ root directory is just a container for your project. Its name doesn’t matter to Django; you can rename it to anything you like.

manage.py: A command-line utility that lets you interact with this Django project in various ways. You can read all the details about manage.py in django-admin and manage.py. The inner mysite/ directory is the actual Python package for your project. Its name is the Python package name you’ll need to use to import anything inside it (e.g. mysite.urls).

*mysite/init.py: An empty file that tells Python that this directory should be considered a Python package. If you’re a Python beginner, read more about packages in the official Python docs.

*mysite/settings.py: Settings/configuration for this Django project. Django settings will tell you all about how settings work.

*mysite/urls.py: The URL declarations for this Django project; a “table of contents” of your Django-powered site. You can read more about URLs in URL dispatcher.

*mysite/wsgi.py: An entry-point for WSGI-compatible web servers to serve your project. See How to deploy with WSGI for more details.