Jupyter is a Python environment built around IPython (Interactive Python). A notebook is a series of "cells" which are snippets of Python code. You execute thes

Jupyter is a Python environment built around IPython (Interactive Python). A notebook is a series of "cells" which are snippets of Python code. You execute these cells and see results in another pane much like if you were just noodling around in the console (except there's one unified place where output appears). Where it's seeing a lot of traction is in data science where someone can explore the data with code, save their exploration, and share it with others. The advantage over a standard paper is that when someone opens a notebook, they see all the code and can run and mess with it independently.