The tutorial demonstrates building a custom QR code generator app using Python and Streamlit.The app allows users to enter text or URL, choose custom colors for the QR code and background, and download the generated QR code image.Technologies used include Python, qrcode for generating QR codes, Pillow (PIL) for image manipulation, and Streamlit for creating the web app.Steps involve installing dependencies, writing the Python code for the app, and running the app using Streamlit.