With WordPress MultiSite, you can run and manage an unlimited number of sites from one installation of WordPress. Each site can have its own content, users, and theme, but you need to update and maintain only one installation.
How do you do this? By creating a network! With just a few clicks, you can set up a network of sites, allow new signups, and assign privileges to your users.
The best part is that this capability is already part of your default WordPress installation—all you need to do is activate it.
Before you begin, double-check with your Web host to make sure that your hosting plan supports multiple sites. ...