Jupyter Notebooks allow you to run code in your browser. In the Collaboratory, you will be able to create Python notebooks in an environment with preloaded neuroscience libraries. This section of the Collab contains tutorials to get started.
The tutorials in the Collab are mostly specific to certain use cases. If you have never coded before, or if you are unfamiliar with Python, you can find resources online. See https://wiki.python.org/moin/BeginnersGuide.