A Jupyter notebook is an interactive computing environment that enables users to create and share documents containing live code, equations, visualizations, and narrative text. It facilitates data analysis through its ability to run code in real-time, allowing immediate feedback and exploration of data insights. Users can document their workflow alongside the code, enhancing collaboration and reproducibility. Additionally, Jupyter notebooks support multiple programming languages, making them versatile for diverse data analysis tasks. Their user-friendly interface and integration with various data science libraries streamline the analysis process, making it accessible for both beginners and experts.