The 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, primarily used for data analysis, machine learning, and scientific research. Users can write code in various programming languages, including Python, and visualize data in real-time. The platform supports collaborative work, making it ideal for educational purposes and team projects. With its user-friendly interface, Jupyter Notebook has become a popular tool among data scientists and researchers for documenting their workflows and sharing insights effectively.