Jamf Nation Community

I am reconfiguring management of mobile apps for next school year - and I see "Prevent backup of app data" - I'm not having any luck finding what this does?? Can anyone tell me?

I am fairly new to Computer Management with JSS. Currently I am developing for 2 different sites and just getting started. Some of the Policies and such that we created in the Jumpstart are going to all devices on both sites, regardless of which site...