Google Colab (short for colaboratory) is a cloud-based Jupyter Notebook environment that enables users to write and execute Python code directly in their browser.

Jupyter Notebooks have been widely-used in the ML community for nearly a decade as a way to help define models and data using an interactive Python language interface.

As someone who often works with Python scripts, Jupyter Notebook is my favorite tool for making notes during lectures and sharing my painstakingly-written code with my programming friends and rivals.