WordPress Multisite lets you run multiple websites from a single WordPress installation. One core, one set of plugins, centralized management — but each site has its own content and (optionally) domain. It’s powerful, but not for everyone.
What Is Multisite?
Multisite creates a network of sites sharing the same WordPress core, plugins, and themes. The network admin controls everything; individual site admins manage only their content. Sites can use subdomains (site1.example.com) or subdirectories (example.com/site1), or mapped domains.
Pros of Multisite
Centralized updates: update plugins/themes once for all sites
Easier management: one login, one dashboard for the network
Resource efficient: shared core reduces server load
Client portals: agencies manage many client sites efficiently
Cons of Multisite
Single point of failure: if the network breaks, all sites break
Plugin conflicts affect all: a bad plugin takes down the network
Migration complexity: moving one site out is difficult
Not all plugins support it: some need per-site licensing
How to Enable Multisite
1. Backup your site. 2. Add to wp-config.php: define('WP_ALLOW_MULTISITE', true); 3. Go to Tools → Network Setup. 4. Choose subdomains or subdirectories. 5. Follow the instructions to add code to wp-config.php and .htaccess. 6. Log in again — the Network Admin appears in the menu.
Use Cases
Multisite shines for university networks, franchise sites, agencies with many clients, multilingual sites, and membership communities. It’s overkill for a single blog or a few unrelated sites.
Frequently Asked Questions
Can each site have its own domain? Yes — with domain mapping (a plugin or built-in since WP 4.9+). Each site can show a completely different domain while sharing the network.
Is Multisite good for SEO? Search engines treat subdomain/subdirectory sites as separate entities. Properly configured, Multisite doesn’t hurt SEO. Avoid thin duplicate content across sites.
Should I use Multisite for client work? Agencies benefit from centralized management, but clients may want ownership of their own install. Weigh convenience against client autonomy before committing.
Conclusion
Multisite is a scalable solution for related sites under one roof. Enable it only if you manage multiple sites that share plugins and themes. For unrelated projects, separate installs are safer. Plan carefully — converting to/from Multisite later is painful.
