WPMU [Wordpress Multi-User]: With WordPress we took blogging to the next level by creating powerful self-hosted software that anyone could install and have a blog within minutes.
Now with MU we’re making it as easy to create a thousand blogs as it was to create a single blog with WordPress 3 years ago. By building on the base of WordPress and syncing development, we get the benefit of the huge ecosystem in plugins and themes that has developed around the project.
Simply put : WPMU allows you to create thousands of WP sites/blogs using a single installation. Think of it as, install WP once and use it as many times as you want, with different content, plugins, templates, etc…
Fine you don’t get it, read up on it and maybe then you’ll get it…
