We skipped over templates and Twig in the previous section, so let's discuss them in more depth.
Templates will become the bread and butter of your experience of theming Drupal. They are the way we logically filter our data and create our required HTML structure. A standard page on a Drupal site is built from a set of nested templates. At each level of the nested structure, different variables are available to you that allow you to render the content you desire. Any of the templates mentioned next can be copied into your theme, either from Drupal core or your parent theme. The base versions of all the templates live in core, but your parent theme may already have templates you can copy that have a structure that gets you most of the way to your goal, or perhaps is already using a specifically named template you want to override.
Here's an example of some of the templates being used on our homepage:
A quick note for those moving from Drupal 7 to Drupal 8—you...