Patch creating process
A Module from drupal.org can be installed manually or with the composer tool, which supposes to be already installed on your server.
A Module is a software that needs to be maintained from time to time, it even has fixes for the current features, and sometimes new features, some of the major updates will come as a normal module update, and can be done via the upgrade page, but sometimes there is a need for fast push of small fix, this is called patch.
