WordPress Multisite allows you to create a network of similar or related WordPress websites and blogs with just one WordPress Installation; however, Multisite is not for everyone.
It is ideal for companies that need to spin up hundreds of micro or niche sites quickly.
Disadvantages of multisite:
The things that make Multisite a great sharer also contribute to its flaws.
Migrations are exceedingly complex as each site shares one database. Migrating one site off your network is very difficult.
You cannot truly separate users; each one will still have access to the entire network. You cannot create separate system users for SFTP uploads.
A plugin cannot be installed on only a single site in the network. Once the network administrator installs the plugin, it will be available for all sites on the network. If you delete a plugin, any site using that plugin will be affected. Some plugins do not work with Multisite.
Multisite can be extremely complex, it would be best to use a standard WordPress installation or multiple installations on a single server if your goal is any of the following:
To manage a small number of different sites.
To organize your content by categories.
To do development work before pushing the site into production.
