Employee Group & Employee Sub Group

Hello everyone,

Can anyone please explain to me what is the employee group and employee subgroups are for, in terms of organizational structures, except from geograpical locations as my provider mentions?

I know that these two terms are useful for location purposes and therefore enable the BW reports to cut and sort the org structure data.

In terms of future modules which could be e-learing, PM, etc, that could be the case for using these two as I understand. Are there any other processes which are useful for?

Also, if you choose not to use these two terms wherelese just to update these two in org structures fields as these are mandetory fields, what is the loss of not updating them in their meaningful values?

Thanks,

Shai