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What is WordPress MU? 

WordPress MU (commonly referred to as Multisite), is now referred to as a "network." Creating a network allows you to create a networks of WordPress sites. Instead of only a WordPress site no, you can create multiple WordPress sites as subdomains. It allows you to manage all of your WordPress sites from one WordPress Dashboard. For example, you have two completely separate WordPress installations on and You will be able to manage both of these blogs from one Admin page or dashboard.


Should I use WordPress or WordPress MU?

WordPress networks do not need to be used on all installations of WordPress. If you only have one instance of WordPress running on each domain your own you do not need to use WordPress MU. However, if you are considering having multiple WordPress sites working on the same domain you should consider creating a network of WordPress website.

Important Advantages

  • Any plugins, upgrade, and themes downloaded will affect all the sites in the network
  • Allows you to have multiple WordPress installations based on one domain
  • Easily allows you to offer blogs to your visitors as subdomains of your website
  • Gives you the ability to manage a clients WordPress site through your Dashboard

How Can I install WordPress MU?

You can install WordPress MU or networking on your account. It can take quite a bit of time to get it set up and working properly though. However, once the network is set up is is quite simple to add more sites to it. 

Please check the next article on Installing WordPress MU or Network. For more information on this course please visit WordPress MU/ Network

Continued Education in Course 203: WordPress MU/ Network
You are viewing Section 1: Using WordPress MU
Section 2: Installing WordPress MU or Network

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Related Questions

Here are a few questions related to this article that our customers have asked:
WordPress Multisite - wildcard subdomain shared plan- will subdir work
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n/a Points
2015-01-13 1:40 pm

I am attempting to activate a wildcard SSL on a WordPress multisite instance (sub-domains). I can get it to work on the primary domain. Any thoughts on how to activate it on the sub-domains?

11,186 Points
2015-01-13 1:48 pm
Due to how cPanel operates, you will not be able to do so within an addon domain if you already have an SSL on that cPanel account. To add an SSL, you will need a VPS or dedicated server in which each domain can be on its own cPanel account.
n/a Points
2015-04-29 5:31 am

Jeff, I'm not sure this answers the question.

As I understand it, John has a wildcard SSL *

He's setting up Wordpress MU with subdomains for the sub-sites in Wordpress, e.g.,,

Is there any reason why the single wildcard ssl installed on the CPanel account wouldn't cover these subdomains?  Any particular reason why this wouldn't work if all the subdomain websites were part of the same parent Wordpress MU installation, as opposed to e.g. standalone websites?


40,705 Points
2015-04-30 9:36 am
Hello KA,

Wildcard SSL covers level of subdomains as you described it. So, as long as the domain names stay within that format, then the wildcard certificate should work. As per your example:,, and would be covered for the wildcard certificate of * For more information, check out Wildcard certificates.

I hope this helps to answer your question, please let us know if you require any further assistance.
Arnel C.
n/a Points
2014-04-09 5:21 pm

I have followed the instructions for WordPress MU here, and installed the wordpress MU domain plugin, but I cannot access the dashboard on my domain mapped sites - but the sites work.  ideas?

40,705 Points
2014-04-09 6:26 pm
Hello Garr,

Sorry to hear about your problem. Unfortunately, you have given us little or no information about your site, so it's difficult for us to guess the problem that you're having or how to troubleshoot the issue. Also, this article is about Wordpress Multisite in general, it's not a plugin. If you're talking about a specific plugin, please specify the plugin name (Wordpress MU domain plugin is NOT a plugin). Please provide specific information on the issue and we would be glad to investigate the issue further.

Kindest regards,
Arnel C.
11,186 Points
2014-03-04 11:06 am
In this situation, you will want to whitelist based on referrer.
n/a Points
2014-03-03 3:07 pm

Hi. So say I used WordPress MU and wanted to password protect WordPress logins for one or all of the sites - what would be done differently from (or in addition to) the directions provided on the following page? Thanks!!

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