We have been hearing about the Multi-Site feature in WordPress 3.0. This doesn’t come by default and to activate this feature you need to configure it in your wp-config.php file.
In this article I am going to tell you how you can enable the Network settings option to enable multi-site feature in WordPress 3.0.
Step 1: Go to the wordpress root directory and open wp-config.php file.
Step 2: Add the following code and save the file
define('WP_ALLOW_MULTISITE', true);
Step 3: Go to your WordPress Dashboard and now you can see “Network” added in your Tools options. This mean you have successfully enable multiple site Network option in WordPress 3.0
Step 4: To add Click on Network under Tools Options and fill in the details and install it