Introducing Flask framework and templating with Jinja.

• Demonstrates a simple web application using Flask and Jinja template inheritance.
• Shows how to run Flask to serve a web application and details the setup of routes in app.py.
• Explains the structure of Flask applications with app.py and templates folder for HTML files.
• Uses a global dictionary to store form submissions temporarily in the server's memory.

Explaining the use of GET and POST methods in web forms.

• Illustrates the use of the GET method to pass data via URL parameters.
• Uses the POST method to hide data from the URL for privacy and larger data uploads.
• Explains the importance of server-side validation, even with client-side attributes like 'required'.

Exploring sessions for user authentication and persistent data.

• Introduces the concept of sessions to maintain state in web applications.
• Shows how to set up session configuration in Flask and use session variables.
• Demonstrates user login and logout functionality using session management.

Building a store application with cart functionality using sessions.

• Creates a store application that allows adding books to a shopping cart stored in a session.
• Executes SQL queries to fetch and display books based on cart contents.
• Utilizes session-based cart to distinguish between different users' carts.

Using APIs to fetch data asynchronously without page reloads.

• Integrates an API to fetch TV show data dynamically based on user input.
• Uses JavaScript's fetch function to perform asynchronous HTTP requests.
• Processes JSON responses to update the web page content in real-time.