Themes in Drupal can be configured to inherit settings, templates, and other assets from a parent theme. This allows theme developers to use a different set of markup as the starting point for their theme, organize various theme assets into a more maintainable structure, and more.

In this tutorial, we need understand:

• Learn what base themes and subthemes are
• Look at a few examples of template inheritance and how that works
• Discuss some use cases for theme inheritance