The “main site” of a network on a WordPress multisite environment is typically the first site (ID 1), and will be listed first in the Network Admin Sites screen.
All new sites added to a multisite network will initially exist as subdirectories of the main site’s domain. It can therefore be useful to have a custom domain assigned to the main site (ID 1) for branding purposes, such as
VIP recommends that the main site is not a publicly accessible site and is used for administrative purposes only. As a non-public site, the main site should have a default theme activated, no content added, and the the Maintenance Mode plugin installed and activated in order to restrict access.
Last updated: January 05, 2024