Jupyter Notebook is an open-source web application that enables users to create and share documents containing live code, equations, visualizations, and narrative text. It serves as an interactive computational environment, making it ideal for data analysis, machine learning, and scientific research. Users can write code in various programming languages, primarily Python, and execute it in real-time, allowing for immediate feedback and exploration of data. Jupyter Notebooks are widely used in academia and industry for their ability to combine code execution with rich text, making them a powerful tool for both learning and presenting complex information.