Google Groups Labels in admin console vs. Shared Labels in Groups for Business interface

[b_gorsky1]

I searched but could not find the difference between these two label types. 

In the admin console for a group, there are Mailing, Security and Dynamic labels and in the Groups for Business there are Shared Labels.

I get the use for Shared Labels but what are the others for in the admin console? I couldn't find any documentation other than a reference to the "Security" label and even that wasn't clear.