If you have used Jupyter notebook previously, you would quickly learn to use Google Colab. To be precise, Colab is a free Jupyter notebook environment that runs entirely in the cloud. Most importantly, it does not require a setup and the notebooks that you create can be simultaneously edited by your team members - just the way you edit documents in Google Docs. Colab supports many popular machine learning libraries which can be easily loaded in your notebook.
As a programmer, you can perform the following using Google Colab.
Write and execute code in Python
Document your code that supports mathematical equations
Import/Save notebooks from/to Google Drive
Import/Publish notebooks from GitHub
Import external datasets e.g. from Kaggle
Integrate PyTorch, TensorFlow, Keras, OpenCV
Free Cloud service with free GPU