Child theme is an attractive concept and apart from WordPress, other enterprise web content management services like Sitefinity CMS, Drupal etc also follows this concept with the name of sub-theme, however no one is as good as WordPress. Child theme is a theme inherited from a build theme with additional features added by a company to suit their business requirements. WordPress allows to reuse this child theme with different websites and also can be shared to the community. The concept saves time and cost of buying multiple themes for different websites. Thanks for sharing useful information to help developers to define a child theme effortlessly.