WordPress Multisite is a powerful feature that lets one installation run many websites - each with its own content, users and themes, but sharing one codebase and one network admin dashboard. Used well, it saves time and maintenance. Used wrongly, it creates headaches. Here is how to decide.

Table of Contents

What Is Multisite?

A Multisite network is a single WordPress install configured to host multiple sub-sites. Sites can share plugins and themes (updated once, everywhere), while content, users and settings stay separate. Super admins manage the network; site admins manage their own sites.

When to Use It

  • You manage multiple similar sites - e.g. local branches of one business.
  • You run a university, franchise or agency with related sites.
  • You want to update one codebase instead of ten.
  • You need a central dashboard for all sites.

When to Avoid It

  • Each site needs completely different plugins.
  • Client sites must be fully independent (separate backups, logins, ownership).
  • One site being hacked should not risk the others.
  • You need total isolation - separate WordPress installs are safer.

How to Set It Up

  1. Add define('WP_ALLOW_MULTISITE', true); to wp-config.php.
  2. Go to Tools > Network Setup and configure URLs.
  3. Follow the instructions to update wp-config.php and .htaccess.
  4. Log in again and add sites from the My Sites menu.

Frequently Asked Questions

Can I have separate domains in Multisite?

Yes, with subdomain or subdirectory networks using domain mapping. It requires a little more configuration and proper DNS setup.

Does Multisite slow down my site?

If you host many busy sites on one plan, resources get shared. Pair Multisite with powerful hosting and caching for good performance.

Multisite is a tool, not a rule. Use it when managing many similar sites outweighs the flexibility of separate installs - and keep your hosting strong enough to carry the load.