Colaboratory or 'Colab' for short is a google web based notebook application that allows developers to run python code in the cloud.
It uses powerful google processors for free.
Colab is a hosted Jupyter notebook service that requires no setup to use, while providing access free of charge to computing resources including GPUs. Colab notebooks are stored in Google Drive, or can be loaded from GitHub. Colab notebooks can be shared just as you would with Google Docs or Sheets. Simply click the Share button at the top right of any Colab notebook.