WordPress Multisite is a feature of the WordPress platform that allows users to create and manage multiple websites from a single installation of WordPress. With Multisite, administrators can create a network of sites, each with its own separate content, themes, and plugins. Multisite can be useful for organizations that need to manage multiple websites, such as a network of businesses, schools, or independent blogs. It provides a centralized management system that allows administrators to manage all of the sites in their network from a single dashboard. Additionally, plugins and themes installed on one site in the network can be made available to all other sites in the network, reducing the need for separate installations and updates. Note that Multisite is an advanced feature of WordPress that requires a greater level of technical expertise to set up and manage than a single site installation. It is not suitable for all users and may not be necessary for many small or individual WordPress sites.