Child theme creation in WordPress website allows separation between parent theme’s core files and personal customisations to the website, where parent theme is a complete theme, which includes all of the required assets for the theme to work.
- Child theme allows changing small aspects of the website appearance, while preserving theme’s look and functionality.
- Child theme inherits the look, feel and functions of the parent theme.
- Modifications made to child theme are kept separate from parent theme’s files.
- Updating parent themes doesn’t destroy modifications made to the child theme.
- Child themes can be generated manually or by using a plugin. I tried using Child Theme Configurator.
Source: https://developer.wordpress.org/themes/advanced-topics/child-themes/