drupal-civicrm/profiles/README.txt

Installation profiles define additional steps that run after the base
installation provided by Drupal core when Drupal is first installed.

WHAT TO PLACE IN THIS DIRECTORY?
--------------------------------

Place downloaded and custom installation profiles in this directory.
Installation profiles are generally provided as part of a Drupal distribution.
They only impact the installation of your site. They do not have any effect on
an already running site.

DOWNLOAD ADDITIONAL DISTRIBUTIONS
---------------------------------

Contributed distributions from the Drupal community may be downloaded at
https://www.drupal.org/project/project_distribution.

MULTISITE CONFIGURATION
-----------------------

In multisite configurations, installation profiles found in this directory are
available to all sites during their initial site installation.

MORE INFORMATION
----------------

Refer to the "Installation profiles" section of the README.txt in the Drupal
root directory for further information on extending Drupal with custom profiles.