Drupal gives the amazing feature to use multisite with share code base, Multisite provides the facility to use single Drupal installation setup (including core code, contributed modules, custom modules, and themes) among several sites in which allows separate, independent sites to use single codebase. Each site has its own database, configuration settings, contents.
Now, We're going to set up one core installation, and share single codebase to those three subsites which we are using. Each subsite will share those files but its own database. In this blog, I'm going to set up three subsites with different URLs: like given below