This document discusses using WordPress Multisite as a development environment. Some key benefits include having a single database and location for plugins/themes, allowing for rapid deployment of new sites. To set it up, some code is added to wp-config.php and .htaccess to enable Multisite and handle subdomains/subdirectories. New sites can then be easily created and each functions independently while sharing plugins/themes network-wide. The process for exporting and importing sites to a live location is also outlined.