Detail the steps required to set up a WordPress multisite network, including the underlying database structure and network management considerations.

Setting up a WordPress multisite network involves several steps that go beyond a regular single-site WordPress installation. It allows you to manage multiple websites from a single WordPress installation, making it more efficient for certain use cases. The setup process modifies both the WordPress configuration and the database structure, requiring a good understanding of these changes. The first step is to prepare your existing WordPress installation or install a fresh WordPress site. Then, before enabling the multisite feature, you must modify your `wp-config.php` file. You need to add the following line within the file, before the line that says `/That's all, stop editing! Happy publishing. */`: ```php define( 'WP_ALLOW_MULTISITE', true ); ``` This line enables the multisite feature. After saving the `wp-config.php` file, you must log into your WordPress dashboard. You will notice a new item in the "Tools" menu called "Network Setup". Clicking on this will guide you to the next step. WordPress will then require you to choose between two types of multisite setups: subdomains or subdirectories. The choice depends on your domain configuration and preference. Subdomain multisite creates new sites with URLs like `site1.example.com`, `site2.example.com`, while subdirectory multisite creates new sites....