Installation profiles define additional steps that run after the base installation provided by Backdrop core when Backdrop is first installed.
Place downloaded and custom installation profiles in this directory.
Installation profiles are generally provided as part of distributions, and only have an effect during the installation phase of a Backdrop website. Installation profiles do not have any effect on a preexisting website.
Contributed distributions from the Backdrop community may be available at https://github.com/backdrop-contrib.
In multisite configurations installation profiles found in this directory are available to all sites during their initial site installation.