WordPress Multisite is a collection of independent websites sharing the same WordPress installation. The sites in the network are virtual sites, meaning that they do not have their own directory on the server, although they do have separate directories for media uploads and separate tables in the database.
In this post I will introduce you to WordPress Multisite. It will be a basic user guide aiming to point out the pros and cons of Multisite vs single site installations, and to show you how to turn a single WordPress site into a Multisite network.
First, I will try to give you an idea of the many reasons you may have to install a network, and conversely of the many factors that could prevent you from installing a Multisite. Following, I will provide an overview of the available types of networks, I will describe the main characteristics of each type, and the system requirements that could force you to choose a