A child theme in WordPress is an additional theme that inherits the look and full functionality of the parent (original) theme. You can make changes to the visual design and functionality of the child theme, and the parent theme will remain intact. And vice versa, if the developer makes changes to the parent theme, the settings of the child theme will remain unchanged.

The child theme of WordPress works at the file level. When some file is required to load a theme, WordPress checks to see if the desired file is in the child theme. If there is, it uses the contents of that file, if not, it downloads the file from the parent theme. The process of creating a child theme requires knowledge and skills to create a site without the help of a CMS. A simple way to create a child theme is to use the Child Theme Configurator plugin. It is enough to insert a link to the parent theme, and the plugin itself will help set everything up.

Advantages of child themes:

• Saves your settings. Using a child theme, you can make changes right in the code without fear of losing your settings when you update the parent theme.
• A child WordPress theme can improve your workflow. Using just one theme, you can create sites with different functionality for multiple clients.