Jupyter Notebook is an open-source interactive computing platform that allows users to create and share documents that contain live code, equations, visualizations, and narrative text. Jupyter Notebook supports various programming languages, including Python, R, Julia, and Scala.

Jupyter Notebooks provide a convenient way to perform data analysis and scientific computing, allowing users to mix code, output, and explanations in a single document. They are widely used in data science, machine learning, and scientific computing for tasks such as data cleaning and transformation, and statistical modeling.