How do WordPress multisite installations work?
The question is about WordPress
Answer:
WordPress Multisite enables you to run multiple websites with a single WordPress installation. It allows the network administrator to set up some kind of central hub where every site shares the same WordPress core files, but each can have its unique themes, plugins, and settings. This makes for a perfect setup for maintaining a network of related websites, like blogs, e-commerce stores, or versions in different languages, since the maintenance and updates are kept in one place. The multisite install can support subdomains-example, site1.example.com-or subdirectories, such as example.com/site1-out of the box, with a number of options for scaling WordPress.