This all sounds very simple but as you will see in this video it's actually very convoluted if you want to do it the right way.
I will show you how to disable cache for Drupal 8 in your development environment so that you can easily disable it once the site goes live. Because of course you want all of that cache goodness for your production environment as it will make your site much faster.
You will also learn how to enable twig debug - one of the Drupal 8 killer features that will help us develop our theme by giving us helpful information about our templates, suggest template names and show us what information from the system we have available on the current page. All good stuff.