These are some common settings you might find on Apps and an explaination of their usecase.
Select your timezone for correct time inside the containers
Select the user id of the user running your application. Defaults to 568 aka the
Select the group of the user running your application. Defaults to 568 aka the
The mask here gets substracted from the default CHOWN setting of your App, it's an advanced setting and we advice not to change this unless you already know what UMASK does.